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Looking for table of primitives

  1. Oct 5, 2004 #1

    quasar987

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    Hi, I'm looking for an ONLINE table of primitives. Does anybody know of a good website?

    Thanks
     
  2. jcsd
  3. Oct 5, 2004 #2

    quasar987

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    Or for now, does anybody know what this integral is

    [tex]
    \int \frac{sinx}{\sqrt{1 + 3sin^2x}}dx
    [/tex]

    ?
     
  4. Oct 5, 2004 #3

    Zurtex

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    Let u = cos(x)
     
  5. Oct 5, 2004 #4

    quasar987

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    ?!

    That's not it. We're still stuck with the square root.
     
    Last edited: Oct 5, 2004
  6. Oct 5, 2004 #5
    It is indeed "it".

    If u = cos(x), then u^2 = cos^2(x) = 1 - sin^2(x) (etc)... The "new" integral can be handled with an inverse trigonometric function.
     
  7. Oct 5, 2004 #6

    quasar987

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    That's genius! Thanks both of you!

    I'm still interested in a table of primitive though ;)
     
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