SOLVE: sin7 theta +sin4 theta+sin theta Share with your friends Share 1 Rakesh Kushwaha answered this Please find this answer -6 View Full Answer Apsr answered this Given, Sin 7theta +sin 4theta +sin theta=0 =>(Sin 7theta+ sin theta)+ sin 4theta=0 =>2sin 4theta.sin 3theta=-sin 4theta =>2sin 3theta=-1 =>Sin 3theta=-1/2=sin 210°=sin 330° So , Theta=70° or 110° 0
