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Math Help - Arctan Derivative Question

  1. #1
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    Arctan Derivative Question

    How do I find the derivative of arctan(x/a)? Where "a" is a constant? I know that the derivative of arctan(x) = 1/(1+x^2), but i can't figure out what happens when the variable is divided by a constant. Thanks in advance!
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  2. #2
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    Quote Originally Posted by cusseta View Post
    How do I find the derivative of arctan(x/a)? Where "a" is a constant? I know that the derivative of arctan(x) = 1/(1+x^2)
    Try \dfrac{\frac{1}{a}}{1+\left(\frac{x}{a}\right)^2}
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  3. #3
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    Thanks for the help!!!!
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