" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
= 2 sin 1/2 (3p+p) cos 1/2 (3p-p)
= 2 sin 1/2 4p cos 1/2 2p
= 2 sin 2p cos p
= 2. 2. sin p cos p cos p
= 4 sin p cos^2 p (A)