Question

if 4 cos^2x-1=0 and 0<x<90 find x

Answer 1

cos^2x=1/4

cos²x =(1/2)²

x=60°

I hope this will help u ;)

Answer 2

4cos^2(x)-1 = 0
Cos^2x= 1/4
Cosx,= 1/2
Cosx= πby3