" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
α β
2 Cos 1/2 (90 + 30) Sin 1/2 (90 - 30)
= 2 Cos 1/2 (120) Sin 1/2 (60)
= 2 Cos 60 Sin 30
= 2 1/2 . 1/2
= 1/2