" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
=3/5.(-24/25)+4/5.7/25
=-72/125+28/125
=-44/125
Cos(A-B) = CosACosB + SinASinB
= 3/5(24/25) + 4/5(7/25)
= 72/75 + 28/75
= 100/75
= 4/3