Question

2sin^2 x +cosx−cos2^x=0 , 0≤x≤360. How to find the nearest degree angle

Answer 1

well first I would write totally in terms of cos(x)
by using the Pythagorean identity sin^2(x)=1-cos^2(x)

Answer 2

I hope you see this will give you a quadratic in terms of cos(x)
do you see this?