solve for `theta` `sinthetacostheta=2`

Solve 3 theta-sin theta=4cos^(2)theta-2

Solve: cos^(2)theta-sinthetacostheta-1/2=0

Solve cos theta+cos 2theta+cos 3theta=0 .

Solve: costheta+sintheta=cost2theta+sin2theta

Solve sin2 theta+cos theta=0

Solve for theta,2 cos^2 theta+sin theta-1=0,0 le theta le pi/2

solve 6sin^(2)theta-sin theta cos theta-cos^(2)theta=3

Solve : sin2theta=cos3theta

Ifp: sin2theta=2sinthetacostheta" where "theta is mango,q: sin2theta=2sinthetacostheta for all theta ,r: sin2theta=2sinthetacos theta for all real values of theta, which of them is not a statement?