If f(x)= cos^(5)(sin(5x)), what is f'(x)? I keep getting it wrong!

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If f(x)= cos^(5)(sin(5x)), what is f'(x)? I keep getting it wrong!

[From: ] [author: ] [Date: 11-10-06] [Hit: ]

It isn't f'(x) = -25x(cos^4 (sin(5x))(sin(sin(5x)))(cos(5x))

I almost get the same answer except i do not get -25x. I get -25cos^4 (sin(5x)sin(sin(5x))cos(5x)

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