Question

please any one solve these. ​

Answer 1

Step-by-step explanation:

A =30°

2A = 2×30° =60°

By substituting the value of the given T-ratio, we get:

$cos(a) = \sqrt{ \frac{1 + \cos(2a) }{2} }$

$\cos(30) = \sqrt{ \frac{1 + \cos(60) }{2} }$

cos 30° = root 3/2

$\sqrt{ \frac{1 + \frac{1}{2} }{2} } = \sqrt{ \frac{ \frac{3}{2} }{2} } = \sqrt{ \frac{3}{4} } = \frac{ \sqrt{3} }{2}$

cos A =root 3/2

Answer 2

Answer:

Answer

Step-by-step explanation:

root 3/2 this is answer I think so please follow me