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Forgot how to integrate

  1. Jan 21, 2009 #1
    1. The problem statement, all variables and given/known data
    how do i integrate sec^2(x)
    i completely forgot how to do this one. i know i could rewrite it as:
    tan^2(x) + 1 and integrate that, but i forgot how to integrate that 1 too

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jan 21, 2009 #2


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    Gold Member

    tan^2(x) + 1 is "obviously" the derivative of tan(x).
  4. Jan 21, 2009 #3


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    Homework Helper

    All you need to remember is that

    [tex] \frac{d}{dx}(tanx)= sec^2x[/tex]

    and you should be well off now.
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