What is the derivative of:(adsbygoogle = window.adsbygoogle || []).push({});

tan^4(3x)

The teacher wrote 4TAN^3(x) + sec^2(3x)(3) but i think he made a mistake.

I know that tan^4(3x) = tan(3x)^4 and that this equals 4tan(3x) in algebra

When I derive this i get the following: sec^2(3x)(3) i'm not sure what to do with the coefficient 4. Can someone give me the exact derivative formula to work this term out so I can copy it down plz.

thanks

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# Simple derivative question

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