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Homework Help: Which trig sub do I use?

  1. Mar 1, 2012 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    3. The attempt at a solution

    I know I need to use trig sub, but which form? I can't seem to find any that fit this form.
  2. jcsd
  3. Mar 1, 2012 #2


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    Science Advisor
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    Gold Member

    A triangle with x on the hypotenuse and 1 on a leg suggests ##x=\sec\theta##.
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