Question

Find the exact values of cos 150° and sin 150°.

1
Cos = -- , sin =
2

Cos = - , sin =
2

1

Cos =-

Cos =

V3
2

V3
2

V3
2

V3
2

sin =.
2

.sin =- 2

Answer 1

Therefore, the exact values of cos 150° and sin 150° are:

cos 150° = -√3/2
sin 150° = 1/2