Question

sin n = sin 45 cos 30 - cos 45 sin 30​

Answer 1

hope it is helpful to you

Answer 2

$sin(a - b) = sina \: \times cosb - \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: cosa \: \times sinb$

so, answer is n=15