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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Originally Posted by cusseta 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 $\displaystyle \dfrac{\frac{1}{a}}{1+\left(\frac{x}{a}\right)^2}$
Thanks for the help!!!!
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