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Math Help - Implicit Differentiation

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    Implicit Differentiation

    I am having problems solving this problem for dy/dx:

    sin(xy)+x^3+y^4 = 0

    I get an answer like dy/dx = (-3x^2)/((cos(xy)(x+y)+4y^3))

    but this is wrong help!
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  2. #2
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    Re: Implicit Differentiation

    Quote Originally Posted by Jackwar42 View Post
    I am having problems solving this problem for dy/dx:

    sin(xy)+x^3+y^4 = 0

    I get an answer like dy/dx = (-3x^2)/((cos(xy)(x+y)+4y^3))

    but this is wrong help!
    The derivative of sin(xy) is cos(xy)(y + xy').

    -Dan
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