is it -3sin^3(3x) or did i miss something?

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- Oct 6th 2012, 12:06 PMdanielsderivative of cos^3(3x)?
is it -3sin^3(3x) or did i miss something?

- Oct 6th 2012, 12:11 PMTheEmptySetRe: derivative of cos^3(3x)?
- Oct 6th 2012, 12:16 PMdanielsRe: derivative of cos^3(3x)?
so then im guessing for f(x) = 2sin(2x) + e^(3x^2) + cos^3(3x)

f '(x) isn't= 4cos(2x) + 3e^(x^2) + -3sin^3(3x) ???? - Oct 6th 2012, 12:19 PMTheEmptySetRe: derivative of cos^3(3x)?
- Oct 6th 2012, 12:29 PMdanielsRe: derivative of cos^3(3x)?
okay thnks