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Homework Help: Integral involving trig substitution

  1. May 10, 2012 #1
    Hello, I am trying to integrate 1/(x^2-1).

    Apparently this can be solved by using trig substitution involving tan ?
    Can someone please help me to understand how to go about it.

    Thanks kindly for any help.
  2. jcsd
  3. May 10, 2012 #2


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    Gold Member

    Let [itex]x= \sec \theta [/itex]
  4. May 10, 2012 #3
    Alternatively you can use partial fractions decomposition. You can also user ##x = \sin{(\theta)}## and multiply by (-1)/(-1).
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