TRIGONOMETRI
- Ukuran Sudut
Satuan ukuran sudut yang sering dipakai adalah derajat (...°) dan radian (rad).
*[ derajat (°) => radian ( rad) ]
360° = 2 radian
360° = 2 rad atau biasa disebut 2 r
a). 1 rad = ..... ° ?
b). 1° = ..... rad ?
Jawab:
a). 360° = 2 rad
* 1 rad = .... °
360° = 2 rad
360° = 2 x 22 rad
7
360 = 22 rad
2 7
180 = 22 rad
7
180 x 7 rad
22
1260 = 1 rad
22
57,272°... = 1 rad
57,3° = 1 rad
b). 57,3° = 1 rad
* 1° = .... rad
b). 57,3° = 1 rad
57,3° x 1° = 1 rad
* 1° = .... rad
1° = 1 rad
57,3
1° = 1 rad
1° = 1 rad
57,272...
1° = 0,017 rad
Contoh Soal:
1). 30° = ...... rad
2). 90° = ..... rad
3). 2 rad = ..... °
3
4). 1 rad = ..... °
3
Jawab:
1). 30° = ...... rad
= 30 x /180 rad = /6 rad = 1/6 rad
2). 90° = ...... rad
= 90 x /180 rad = /2 rad = 1/2 rad
3). 2 rad = ..... °
3
= 2 x 180 = 120°
3
4). 1 rad = ..... °
3
= 1 x 180 = 60°
3
SELESAI...
Semoga Bermanfaat :)
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