shoaib_099
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- Jan 17, 2019
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prove the identity cosx-2cos3x+cos5x=2sinx(sin2x-sin4x)
prove the identity cosx-2cos3x+cos5x=2sinx(sin2x-sin4x)
prove the identity cosx-2cos3x+cos5x=2sinx(sin2x-sin4x)
Hint:prove the identity cosx-2cos3x+cos5x=2sinx(sin2x-sin4x)