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Question about a derivative and double angle formula

  1. Oct 9, 2007 #1
    If I am supposed to find the derivative of the equation sin^2(x) the derivative is
    2sinxcosx, by the double angle formula can I say that the derivative is therefore sin2x or can I not do this because I am simply finding the derivative.
  2. jcsd
  3. Oct 9, 2007 #2


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    Staff Emeritus
    Science Advisor

    Yes you can, since the two are equivalent.
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