How do you differentiate $f(x)=cos^3x$ ?

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Answer 1 · 2018-05-20T01:22:22

$-3cos^2(x)sin(x)$

Apply the power rule
$dy/dx=3cos^2x*d/dxcosx$
= $3(-sinx)(cos^2x)$
= $-3sin(x)cos^2(x)$

How do you differentiate f(x)=cos^3xf(x)=cos^3x?