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Homework Help: Derivative of trig function

  1. Feb 18, 2009 #1
    1. The problem statement, all variables and given/known data
    How would I find d/dt of (cos)^3(t).
    How would I find d/dt of (sin)^3(t)


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 18, 2009 #2

    Tom Mattson

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    From the PF Global Guidelines:

     
  4. Feb 18, 2009 #3
    I have no idea to do it or I would have show my attempt. All I know is the derivatives of cosx is -sinx and sinx is cosx
     
  5. Feb 18, 2009 #4

    Tom Mattson

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    Haven't you learned about the Chain Rule?
     
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