How do you calculate, the derivative of $cos^3x$ ?

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Answer 1 · 2015-04-11T00:09:06

I would use the Chain Rule to deal separately with the $()^3$ and $cos$ functions getting:
$y'=3cos^2(x)(-sin(x))=-3sin(x)cos^2(x)$

How do you calculate, the derivative of cos^3xcos^3x?