Solve:
`sin2theta+sin4theta=costheta+cos3theta`

Solve : sin2theta=cos3theta

Solve: costheta+sintheta=cost2theta+sin2theta

costheta-cos2theta=sin3theta

(sin 5theta+ sin 2theta- sin theta)/(cos5theta+2cos3theta+2cos^2theta+costheta) is equal to

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

Prove that (sin theta+ sin 2theta + sin 3 theta)/(costheta+cos2theta+cos3theta)=tan 2 theta

If theta=30° , show that 3sin theta- 4sin^3 theta= sin theta cos2 theta + costheta sin 2theta .

(sin5theta+sin2theta-sintheta)/(cos5theta+2cos3theta+2cos^2theta+costheta) is equal to

Show that costheta [[costheta, sintheta],[-sintheta, cos theta]] + sin theta [[sintheta ,-cos theta],[costheta, sin theta]] =1