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Math Help - Last differential question. Trig inside a trig.

  1. #1
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    Last differential question. Trig inside a trig.

    f(x) = 9sin(cos(x^6))

    I think im supposed to use the chain rule here but not sure how.
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
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    f(x)=9\sin(\cos x^6)\implies f'(x)=9\cos(\cos x^6)\cdot(\cos x^6)'

    Can you take it from there?
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  3. #3
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    yes yes. thank you very much. i really need to study this mess.
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