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Math Help - derivative help

  1. #1
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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. #2
    Rhymes with Orange Chris L T521's Avatar
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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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