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Verified answer
Sin (A- B) = nsin A cos B - cos A sin B = n
m - cos A sin B = n
- cos A sin B = n - m
cos A sin B = m - n
sin A . cos B - cos A . sin B = n
m - cos A . sin B = n
- cos A . sin B = n - m
cos A . sin B = m - n
gitu ga sih jawabannya?.-.