Posted by Mac on .
Determine the solution set to the equation: 2sin^2x+cosx2=0

Math 
Reiny,
I will assume your domain is 0  360
2sin^2x+cosx2=0
2(1 cos^2x) + cosx  2 = 0
2  2cos^2x + cosx  2 = 0
2cos^2x  cosx = 0
cosx(2cosx  1) = 0
cosx = 0 or cosx = 1/2
x = 90º or 270º or x = 60º or x = 300º
these can be easily converted to radians