Prove that `sin^2theta

Prove that: (sin2theta)/(1+cos2theta)=tantheta

Prove that: (sin2theta)/(1-cos2theta)=cottheta

Prove that (sin theta+sin 2theta)/(1+cos theta+cos 2 theta)=tan theta

Prove that (1+sin2theta)/(1-sin2theta)=((1+tantheta)/(1-tantheta))^2

Prove that (sintheta +sin2theta)/(1+costheta +cos2theta)=tantheta

Prove that sin (theta)/(2) sin"" (7 theta)/(2) + sin ""(3theta)/(2) sin ""(11 theta)/(2) = sin 2theta sin5 theta .

Prove that sin^(6)theta+cos^(6)theta+3sin^(2)thetacos^(2)theta=1

Prove that sintheta+sin3theta+sin5theta+.....+sin(2n-1)theta=(sin^2ntheta)/(sintheta)dot

Prove that (sin theta -cos theta+1 )/( sin theta + cos theta -1) =(1)/( sec theta -tan theta ) [use the identity sec ^(2) theta =1 +tan ^(2) theta ]