Prove that sin3x + sin 2x – sinx = 4 sinx cos x/2 cos3x/2 Share with your friends Share 37 Laxmi Bisht answered this Hi Vinit, Here is the answer to your question. All the Best! 170 View Full Answer Piyush Mishra answered this = (sin3x - sinx)+sin2x= 2cos2x sinx +sin2x =2cos2x sinx +2sinx cosx=2sinx( cos2x +cosx)= 2sinx(2cos3x/2 cosx/2 )=ans -8
