Solve `4sintheta sin2thetasin4theta=sin3theta`

Solve : 4sinthetasin2thetasin4theta=sin3theta

Solve: 4sintheta sin2theta sin4theta = sin 3theta

Solve 4sin theta sin2 theta sin4 theta=sin3 theta

sintheta+sin7theta=sin4theta

Solve: sin3theta=sin2theta

Solve: sin3theta=sin2theta

sintheta+sin2theta+sin4theta+sin5theta=0

Solve: sin4theta=sintheta

Solve: sin4theta=sintheta

Sum to terms of the series sintheta sin2theta + sin2thetasin3theta + sin3theta sin4theta +..... is equal to