Question

if sin alpha = 4/5 and cos beta = 12/13 find sin alpha cos beta +cos alpha sin beta

Answer 1

hey!!...
sin alpha=4/5 , cos beeta=12/13
cos alpha=3/5, sin beeta=5/13
=4/5 x 12/13 + 3/5 x 5/13
=48/65 + 15/65
=63/65
Hope this answer helps you!!!