Question

If 2 cos 20=√3, then value of angle Q is A. 150° B. 60° C. 30° D. 90°​

Answer 1

Step-by-step explanation:

Correct option is

B

15

∘

2

sin(60°−α)=1

⇒sin(60°−α)=

2

1

⇒sin(60°−α)=sin45°

⇒(60°−α)=45°

⇒α=15°

Hence, the answer is 15°.