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Mathematics 8 Online
OpenStudy (anonymous):

12cos6x*sin2x expressed as a sum or difference would be 6(sin8x-sin4x), correct?

OpenStudy (ybarrap):

Yes, since (12cos6x*sin2x) - 6(sin8x-sin4x) = 0 : http://www.wolframalpha.com/input/?i=%2812cos6x*sin2x%29+-+6%28sin8x-sin4x%29

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