Question

answer this question please​

Answer 1

Answer:

cos A = √3/2

cos A= cos 30°

A=30°

sin 2A= sin 2×30° = sin 60°=√3/2

Answer 2

Step-by-step explanation:

$\cos(a) = \frac{ \sqrt{3} }{2} \\ a \: = 30 \\ \\ \sin(2a) = \sin(60) = \frac{ \sqrt{3} }{2}$

hence answer is root 3 / 2