sin4 theta+sin20

Prove that: sin4 theta=4 sin theta cos^(3)theta-4cos theta sin^(3)theta

sin3 theta=4sin theta sin2 theta sin4 theta in0<=theta<=pi has

sin4 theta-sin2 theta=cos3 theta

Prove that sin theta sin(60^(@)-theta) sin(60^(@)+theta)=1/4 sin3theta .

Prove that sin theta sin(60^(@)-theta) sin(60^(@)+theta)=1/4 sin3theta .

sin theta +sin 2theta+sin3theta+sin4theta=0

Solve the following equations and write general solutions 4 sin theta sin 2 theta sin 4 theta = sin 3 theta

Solve 4sin theta sin2 theta sin4 theta=sin3 theta

( sin 2 theta + 2 sin 4 theta + sin 6 theta )/(sin 4 theta + 2 sin 6 theta + sin 8 theta ) =

sin4 theta.sin6 theta=