Ubalah satuan sudut berikut ! 1 ) 45° = ... rad ? 2) 75° = ... phi rad ? 3) 2,5 rad = ... ° 4) 5/3 phi rad = ... °

Penyelesaian :

1) 45° = 45 x 0,0175  = 0,7875 rad

2) 75° = 75/180 = 5/12 π rad

3) 2,5 rad = 2,5 x 57,3 = 143,25°

4) 5/3 π rad = 5/3 x 180 = 300° 

45° = (45°/180°) π rad = 1/4 π rad

75° = (75°/180°) π rad = 15/36 π rad

2,5 rad = 2,5 × 180°/π = 143,24°

5/3 π rad = 5/3 π × 180°/π = 300°