Question

14sin187sin97 /sin374

Answer 1

$frac{14sin187 sin97}{sin374}=frac{14 sin(180+7) sin(90+7)}{sin(360+14)}=frac{-14 sin7 cos7}{sin14}</var><var>= frac{-14 sin7 cos7}{2 sin7 cos7}=-7$