Prove that `tantheta=(sintheta-2sin^3theta)/(2cos^3theta-costheta)`

Prove that (frac(sintheta-2sin^3theta)(2cos^3theta-costheta))=tantheta

Prove that (sintheta-2sin^3theta)/(2cos^3theta-costheta)=tantheta .

Prove that : (sintheta-2sin^(3)theta)/(2cos^(3)theta-costheta)-tantheta

Prove that : (sintheta-2sin^(3)theta)/(2cos^(3)theta-costheta)-tantheta

Prove the following (sintheta-2sin^3theta) /(2cos^3theta-costheta) =tantheta

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

(sin3theta-cos3theta)/(sintheta+costheta)+1 =

Prove the following identities, where the angles involved are acute angles for which the expressions are defined. : (sintheta-2sin^3theta)/(2cos^3theta-costheta) =tantheta .

Prove that sintheta/(cos3theta)+(sin3theta)/(cos9theta)+(sin9theta)/(cos27theta)=1/2(tan27theta-tantheta)