Question

4cos^2 A -3=0 find A​

Answer 1

Answer:

A=30 degree

Step-by-step explanation:

Cos^2A=3/4

Cos A=

$= \frac{ \sqrt{3} }{2}$

Cos A= cos 30

A=30 degree

Answer 2

Answer:

$4\cos^2 A -3=0\\\\\cos^2A =\frac{3}{4} \\\\\cosA =\frac{\sqrt{3} }{2} =\cos \frac{\pi}{6} \\\\A=2n\pi+\frac{\pi}{6}$

Step-by-step explanation: