Question

if A+B=60° then prove that sin(120°-A)=cos(30°-B)

Answer 1

A+B=60°
A=60°-B

sin (120°-60+B)=sin (90°-30°+B)
sin (60°+B)=sin (60°+B)


which is true
so,
Hence proved


HOPE IT HELPS
THANK YOU.