1.
Nilai dari 540° = . . .
a.
5π rad d. 2π rad
b.
6π rad e. 4π rad
c.
3π rad
2. Cos
150º senilai dengan …
a.
d. ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image004.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image002.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image004.gif)
b.
1 e. 0
c.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image006.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image006.gif)
3. Bentu
dari
identik dengan. . .
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image008.gif)
a.
sin
d. tan![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image012.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image010.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image012.gif)
b.
cos x e. sin x
c.
cos![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image012.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image012.gif)
4. Koordinat
cartesius dari titik p(10,60º) adalah . . .
a. (5,
) d.
(4,
)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
b. (5, 2
) e.
(5,
)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image020.gif)
c. (4, 3
)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
5. Bentuk
sederhana dari sin 120º adalah. . .
a.
0 d.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image006.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image006.gif)
b.
e. 1
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
c.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
6. Nilai
dari sec 315º adalah. . .
a.
d.
0
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
b.
e
. ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
c. 1
7. Diketahui
segitiga ABC siku-siku di B ,a = 8cm, c = 6cm ,Maka sinA = . . . .
a.
b.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image032.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image032.gif)
c.
e.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image036.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image034.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image036.gif)
d. ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image038.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image038.gif)
8.
Cos 150º senilai dengan. . .
a. cos
30 º d. sin 210º
b. cos
210º e. sin 30º
c. sin
330º
9.
Dari
ABC diketahui sudut A = 120º, sudut B = 30º dan AC = 5
cm, Maka panjang sisi BC = . . .
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image040.gif)
a.
cm d.
cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image042.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image044.gif)
b.
cm e.
cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image044.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image020.gif)
c.
cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image048.gif)
10. Koordinat
cartesius dari titik (2,210º) adalah. . .
a.
d.
)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image050.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image052.gif)
b.
e.
(-1,
)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image054.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
c. (1,
)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image057.gif)
11. Himpunan
penyelesaian dari persamaan trigonometri sin x =
, untuk 0 ≤ x ≤ 180 adalah. . .
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
a. ( 45°,
150° ) d. ( 30°, 150° )
b. (
30°, 100° ) e. ( 30°, 120°
)
c. ( 45°,
100° )
12. Himpunan
penyelesaian dari persamaan trigonometri berikut cos x = cos 54°, untuk 0 ≤ x ≤
360° adalah. . .
a. (
50°, 60°, 180°) d. (50°, 180°)
b. (
54°, 180°, 306°) e. (60°, 180°)
c. (
54°, 306°)
13. Seorang
anak berdiri di suatu tempat A di tepi sungai yang lurus. Ia mengamati dua
pohon , B dan C yang berada di seberang sungai. Pohon B tepat berada lurus di
seberang A. Jarak pohon B dan C adalah 8
meter dan besar sudut BAC = 30° , lebar sungai adalah
. . .
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image060.gif)
a.
m d.
24
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image062.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
b.
m e.
24
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image065.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image067.gif)
c. 8
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
14. Diketahui
Δ ABC dengan
panjang sisi AB = 3 cm, AC= 4 cm dan ∠CAB =
60°
.
CD adalah tinggi Δ ABC.
Panjang CD adalah . . .
a.
d. 2
cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image070.gif)
b.
e.
2![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image072.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image072.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image072.gif)
c. ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image075.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image075.gif)
15. Diketahui
segitiga ABC dengan panjang sisi AB = 3 cm dan BC= 4 cm dan AC = 5 cm. Nilai
Cos C adalah. . .
a.
d.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image078.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image034.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image078.gif)
b.
e.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image082.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image080.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image082.gif)
c.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image084.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image084.gif)
16. Pada
ABC diketahui
AC = 6, sudut A = 120° dan sudut B = 30°. Maka luas segitiga ABC adalah. . . .
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image040.gif)
a. 6
cm
d. 9
cm![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
b. 6
cm
e. 18
cm![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
c. 9
cm![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
17. Andika
menaiki tangga yang bersandar pada tembok. Panjang tangga tersebut adalah 6 m
dan sudut tangga di lantai 60°, Maka tinggi ujung tangga dari permukaan lantai
adalah . . .
a. 2 m
b. 3 m d. 2
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
c. 3
m e. 4
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
18. Dika
ingin membuat sebuah segitiga ABC, jika dia buat panjang AB = 10cm , BC = 12cm
dan sudut B dia buat 60 cm. Maka panjang AC adalah . . .
a. 2
cm d.
2
cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image097.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image099.gif)
b. 2
cm e.
2
cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image101.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image103.gif)
c. 2
cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image105.gif)
19. Diketahui
segitiga ABC dengan panjang sisi-sisinya a = 9cm, b = 7cm, dan c = 8cm. Nilai
cos c = . . .
a.
d.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image109.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image107.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image109.gif)
b.
e.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image113.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image111.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image113.gif)
c. ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image115.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image115.gif)
20. Ochandika
berjalan sejauh 50 m dengan jurusan 30°, kemudian dia lanjutkan berjalan sejauh
80 m jurusan 135°. Jarak Ochandika sekarang dengan posisi semula adalah . . .
a. 30
m d. 70
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
b. 40
m e.
80
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
c. 50
m
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
PEMBAHASAN SOAL
TRIGONOMETRI
1.
Dik
: 1º = ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image120.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image120.gif)
Dit : 540º = … π rad
Jwb :
1º = ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image120.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image120.gif)
540º
= ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image123.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image123.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image125.gif)
Kunci C
2.
Cos 150º = Cos(180º-150º)
= - Cos 30º
=
.Kunci A
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image002.gif)
3.
= ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image128.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image008.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image128.gif)
= ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image130.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image130.gif)
=
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image132.gif)
= ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image134.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image134.gif)
=
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image136.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image136.gif)
=![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image138.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image138.gif)
= sin
. kunci A
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image010.gif)
4.
Dik : titik p(10, 60º), r = 10, α = 60º
Dit : koordinat cartesius (x,y) = . . .?
Jwb
: x = r cosα y = r sin 60º
= 10 cos 60º = 10 ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
= 10 .
= 5![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
= 5
jadi
(x,y) = ( 5, 5
). Kunci E
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
5.
sin 120º = sin ( 180º - 60º)
= sin 60º =
Kunci C
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
6.
sec 315º = ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image146.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image146.gif)
=![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image148.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image148.gif)
7.
Dik :
siku-siku di B,
a = 8cm, c = 6cm. Maka b =
=
= 10cm.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image150.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image152.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image154.gif)
Dit
: SinA=. . .?
Jwb
: SinA =
=![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image158.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image156.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image158.gif)
8. Cos
150º = cos(180º - 30º )
= cos 30º
Karena
terletak di kuadran II, maka nanti
hasilnya jadi negative(-).Kunci A
9.
Dik : Sudut A = 120º
Sudut
B = 30º
Panjang AC = 5cm
Dit
: Panjang BC = . . .?
Jwb
: Dengan Aturan Sinus
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image160.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image162.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image164.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image166.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image168.gif)
10. Dik :
titik ( 2, 210º) , r = 2, α = 210º
Dit : Koordinat cartesius = . . .?
Jwb
: x = r cos α y = r sin α
= 2 cos 210º = 2 sin 210º
= 2 .
= 2. ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image004.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image002.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image004.gif)
=
= ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image173.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image057.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image173.gif)
Jadi,
koordinat cartesiusnya (
-1 )
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image175.gif)
Kunci B
11. Dik :
sin x =
, untuk 0° ≤ x ≤ 180°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
Dit
: Himpunan penyelesaiannya = . . .?
Jwb
: sin x = ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
Sin x = sin 30°
x = α + k · 360°
x = 30° + k · 360°
Untuk
k = 0
x = 30°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
k
= 1
x = 390°. Tdk memenuhi
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
atau x = (180° - α) + k · 360°
x
= ( 180° - 30°) + k · 360°
untuk
k = 0
x = 150°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
k = 1
x = 510°. Tdk
memenuhi
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
Jadi
himpunan penyelesaiannya ( 30° , 150°) Kunci
D
12. Dik :
cos x = cos 54°, 0° ≤ x ≤ 360°
Dit
: Himpunan penyelesaiannya = . . .?
Jwb
: cos x = cos 54°
x° = α + k · 360°
untuk
k = 0
x = 54°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
k = 1
x = 414° tdk
memenuhi
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
atau
x = - α + k · 360°
x =
-54 + k · 360°
untuk
k = 0
x = -54° tdk memenuhi
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
k = 1
x = 306°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
Jadi
himpunan penyelesainnya ( 54°, 306° ) Kunci
C
13. Dik :
BC =
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image184.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image182.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image184.gif)
Dit
: lebar sungai ( AB) =. . .?
|
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image188.gif)
|
|
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image190.gif)
Dengan
aturan Sinus di dapat
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image192.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image194.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image196.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image198.gif)
|
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image200.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image179.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
14.
|
|
|
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image202.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image203.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image204.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image205.gif)
|
![Text Box: 60°](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image206.gif)
![Text Box: 3cm](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image207.gif)
Dit
: Panjang CD =. . .?
Jwb : Luas ΔABC =
·AB sinα
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image209.gif)
=
· 4 · 3 sin 60°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
= 6
= 3
cm![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
CD= 2
cm. Kunci E
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
|
15.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image219.gif)
Dik :
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image219.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image220.gif)
![Text Box: c=3cm](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image221.gif)
![Text Box: b=4cm](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image222.gif)
![]() |
![Text Box: a=5cm](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image224.gif)
Dit : Nilai cos C = . . .?
Jwb : c
= a
+ b
- 2ab cos C
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
3
= 5
+ 4
- 2·5·4 cos C
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
9 = 25 + 16 – 40 cos C
40 Cos C = 32
Cos C = ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image230.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image230.gif)
C0s C =
Kunci A
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image034.gif)
16. Dik :
AC = 6 cm, ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image233.gif)
, karena
= 30°, maka
sama kaki
dengan AC=AB= 6cm
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image233.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image235.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image237.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image150.gif)
Dit :
Luas
= . . .?
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image150.gif)
Jwb : L =
AB · AC ·Sin A
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
=
· 6 · 6 Sin 120°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
=
· 36 · ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image026.gif)
=
= 9
cm
. Knci D
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image243.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
17. Dik :
Tangga seperti gambar di bawah.
Panjang tangga = AC = 6 m,
60°,
= 90°.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image247.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image249.gif)
![]() |
![Text Box: 6 m](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image251.gif)
|
|
Dit : Tinggi ujung tangga dari permukaan lantai ( BC ) = . . .?
Jwb :
Dengan aturan Sinus
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image253.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image192.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image256.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image258.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image260.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image262.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image264.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image017.gif)
18. Dik :
, panjang AB ( c ) = 10 cm, BC ( a ) = 12 cm dan
= 60°.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image150.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image249.gif)
Dit : Panjang AC ( b ) = . . .?
Jwb
: Dengan Aturan Cosinus
b
= a
+ c
- 2ab cos B
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
b
= 12
+10
- 2·12·10 Cos
60°
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
b
= 144 + 100 –
240 · ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
b
= 244 – 120
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
b
= ![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image271.gif)
= 2
cm. Knci C
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image271.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image273.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image105.gif)
19. Dik :
, dengan a = 9 cm, b = 7 cm, dan c = 8 cm.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image150.gif)
Dit : Nilai Cos c = . . . ?
Jwb : dengan aturan Cosinus
c
= a
+ b
- 2ab Cos c
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
8
= 9
+ 7
- 2 · 9 · 7 Cos c
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image088.gif)
64 = 81+49 – 126 Cos c
126 Cos c = 130 – 64
Cos c =
=
. Knci B
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image276.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image278.gif)
20.
Dik :
misal posisi semula Ochandika adalah A, maka
= 30°, dan berjalan ke titik C sejauh 50 m, dari C
berjalan ke B sejauh 80 m dengan
= 135°, Jadi
kita dapatkan gambar seperti di bawah
![Text Box: C](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image279.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image281.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image283.gif)
![Text Box: 50m](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image284.gif)
![]() |
![Text Box: 135°](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image286.gif)
![Text Box: 80 m](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image287.gif)
![Text Box: 30°](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image288.gif)
![Text Box: A](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image289.gif)
![Text Box: B](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image290.gif)
Dit
: Jarak posisi sekarang dengan semula ( AB ) = . . .?
Jwb : dengan aturan sinus
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image192.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image194.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image294.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image294.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image296.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image024.gif)
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
AB = 80
meter
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
Jadi
Jarak Ochandika sekarang dengan posisi semula yaitu 80
meter.
![](file:///C:%5CUsers%5Coka%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_image015.gif)
Kunci : E
SIMPULAN JAWABAN
1.
C 11.
D
2.
A 12.
C
3.
A 13.
D
4.
E 14.
E
5.
C 15.
A
6.
B 16.
D
7.
C 17.
C
8.
A 18.
C
9.
E 19.
B
10. B 20. E
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