Simplify 4sin4xcos4x
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Simplify 4sin4xcos4x

[From: ] [author: ] [Date: 12-04-10] [Hit: ]
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2sin8x

EDIT: Remember that 2sinxcosx = sin2x (this is just an identity).
So you have 2*2sin(4x)cos(4x). If you let u=4x then you have
2*2sinucosu = 2sin(2u) = 2sin(2*4x) = 2sin(8x)
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keywords: xcos,Simplify,sin,Simplify 4sin4xcos4x
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