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Math Help - Derivative

  1. #1
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    Derivative

    Calculate the derivative of (xsina + cosa)(xcosa - sina)
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  2. #2
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    with respect to what?
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  3. #3
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    Sorry. It actually doesn;t say in my assignment...I would guess with respect to x.
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  4. #4
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    Expand it out and you'll get a quadratic equation in x. Treat the a's as constants.
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