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Mathematics, 01.07.2020 16:01 heathercollard57
Prove sin(n+1)sin(n+2)x+cos(n+1)x cos(n+2)x = sin(x+y).
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Prove sin(n+1)sin(n+2)x+cos(n+1)x cos(n+2)x = sin(x+y)....
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