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Thread: derivative help

  1. November 20th 2008, 09:26 PM #1
    jvignacio
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    derivative help

    <br /> y=cot\sqrt{x}<br />

    <br /> = -csc^2x(x)^\frac{1}{2}-\frac{1}{2}x^\frac{-1}{2}<br />

    corrrecT?
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  2. November 20th 2008, 09:28 PM #2
    Chris L T521
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    Quote Originally Posted by jvignacio View Post
    <br /> y=cot\sqrt{x}<br />

    <br /> = -csc^2{\color{red}x}(x)^\frac{1}{2}{\color{red}-}\frac{1}{2}x^\frac{-1}{2}<br />

    corrrecT?
    The x in red is not necessary, and the - sign shouldn't be there. You end up multiplying those terms together, not subtracting them!

    --Chris
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