Asked by Fiza
sin(x+y)-sin(x-y)
Answers
Answered by
Damon
sin(x+y) = sin x cos y + cos x sin y
sin(x-y) = sin x cos y - cos x sin y
subtract
= 2 cos x sin y
sin(x-y) = sin x cos y - cos x sin y
subtract
= 2 cos x sin y
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