Question

plz help me.........

Answer 1

♒♒♒ answer ♒♒

$we \: know \: that \\ \\ sin \alpha = \cos(90 - \beta ) \\ so \: from \: here \: we \: can \: write \\ lhs \\ \sin(60 - \alpha ) \\ = \sin(90 - (60 - \alpha ) \\ = \sin(90 - 60 + \alpha ) \\ = cos (30 + \alpha ) \\ = rhs \\ = proved$

♒♒♒

hope it helps