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Whats the intergral of sqrt(25-9x^2)?

  1. Dec 23, 2009 #1
    Whats the intergral of sqrt(25-9x^2)?
     
  2. jcsd
  3. Dec 23, 2009 #2
    Re: Intergration

    Factor out a 25 from under the radical and use trig substitution.
     
  4. Dec 23, 2009 #3
  5. Dec 23, 2009 #4

    Mark44

    Staff: Mentor

    Re: Intergration

    I would factor out 9 from under the radical to give 1/3*sqrt(25/9 - x^2) and use trig substitution. After I got the antiderivative I might then go to the Wolfram site to check my result against theirs.
     
  6. Dec 23, 2009 #5

    Mark44

    Staff: Mentor

    Re: Intergration

    BTW, there is no such word as "intergral."
     
  7. Dec 23, 2009 #6

    arildno

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    Science Advisor
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    Gold Member
    Dearly Missed

    Re: Intergration

    Nonsense.

    The intergral, or rather, in German, Der Inter-Graal, was the cup Jesus drank from in the wedding in Kanaan(?) where he made water into wine.

    This to distinguish it from the grail, or Der Graal, the cup he drank from at the last Supper.
     
  8. Dec 24, 2009 #7

    Mark44

    Staff: Mentor

    Re: Intergration

    OK, let me be more specific: there's no such word as "intergral" in English. And it appears that there is no such word in German, either. Inter-Graal != intergral.:smile:
     
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