Question 668230
It states to find all values of theta in [o,360] that satisfy each equation 
cos theta - 2 sin squared = 1
**
cosx-2sin^2x=1
cosx-2(1-cos^2x)-1=0
cosx-2+2cos^2x-1=0
2cos^2x+cosx-3=0
factor:
(2cosx+3)(cosx-1)=0
2cosx+3=0
cosx=-3/2(reject,-1 ≤ cosx ≤1)
or
cosx-1=0
cosx=1
x=0