Solve the equation in the interval 0The Question:<θ<2 pi.

cosθ+ cos2θ +sin2=0

Well, my hunch was to factor this equation. But, at least to my innumerate eye, it looks as if it cannot be factored. I am a bit confused by the structure of this equation. I'm not use to seeing anything like "sin" without aAttempted Solution:θ. The answers probably really easy and maybe it's just tiredness preventing me from seeing the solution, but could someone help?