SOLUTION: prove sin(5A) + sin(2A) - sin(A) = sin2A(2cos3A + 1)

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Question 1200485: prove sin(5A) + sin(2A) - sin(A) = sin2A(2cos3A + 1)
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
sin2A(2cos3A + 1)
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Not clear