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Simple Calc Problem: Arctan

  1. Dec 7, 2009 #1
    1. The problem statement, all variables and given/known data

    Find the derivative of the function. Simplify if possible.

    y = arctan (x + sqrt(1+x^2))

    2. Relevant equations

    I know there's something like... y = arctan(x) = ( x = tan(y) )

    I'm not sure how to manipulate it...

    3. The attempt at a solution

    I'm not really sure how to start, any help would be greatly appreciated.

  2. jcsd
  3. Dec 7, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    You probably know the derivative of arctan. If so, just differentiate it using the chain rule and do some algebra to simplify it.
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