(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the derivative of

[tex]f(x)=2x^3+cos^2(x^3)[/tex]

3. The attempt at a solution

[tex]f'(x)=6x^2+2cos(x^3)*-sin(x^3)*3x^2[/tex]

[tex]f'(x)=6x^2-6x^2cos(x^3)sin(x^3)[/tex]

The book has a different solution since they always simplify, but how would I simplify it? I know it has something to do with the 6x^{2}, but the 2nd 6x^{2}is attached to the cos.

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# Homework Help: Simplifying a derivative

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