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Posers and Puzzles

Posers and Puzzles

  1. 08 Sep '06 15:21
    how do u integrate square root of sinx.
  2. Subscriber Suzianne
    Misfit Queen
    08 Sep '06 16:00
    Originally posted by The Avenger
    how do u integrate square root of sinx.
    so where are all the "smart" guys now, huh?

    too busy in other threads telling people what they can and can't post, I imagine.

  3. Subscriber AThousandYoung
    Proud Boys Beware
    08 Sep '06 16:32
    Originally posted by The Avenger
    how do u integrate square root of sinx.
    "These integrals do not have closed forms in terms of elementary
    functions, but they are reducible to elliptic integrals of the
    first and second kinds.

    You can find the definition of elliptic integrals in most books."

    http://groups.google.co.uk/group/sci.math/msg/3087fcde6ade8786?dmode=source&hl=en

    I don't know what that means unfortunately.
  4. Standard member PBE6
    Bananarama
    08 Sep '06 18:02 / 1 edit
    Originally posted by The Avenger
    how do u integrate square root of sinx.
    Handy website:

    http://integrals.wolfram.com/index.jsp
  5. 08 Sep '06 18:44
    Originally posted by Suzianne
    so where are all the "smart" guys now, huh?

    too busy in other threads telling people what they can and can't post, I imagine.

    Erm...well you've not exactly given much time for the "smart guys" to answer before writing this.

    As already mentioned, that integral won't have a nice answer in terms of elementary functions.

    A numerical approximation, on the other hand, is straightforward.
  6. 08 Sep '06 22:11
    Originally posted by The Avenger
    how do u integrate square root of sinx.
    The answer is you can't
  7. Subscriber sonhouse
    Fast and Curious
    09 Sep '06 15:22
    Originally posted by The Avenger
    how do u integrate square root of sinx.
    I input (sin x)^.5 and got an answer, its pretty long. At Intregals.wolfram.com
  8. 10 Sep '06 22:54
    Originally posted by sonhouse
    I input (sin x)^.5 and got an answer, its pretty long. At Intregals.wolfram.com
    You'd have to use a hypergeometric function which i've never heard of
  9. Standard member XanthosNZ
    Cancerous Bus Crash
    11 Sep '06 07:39
    -((1+sin(x))^(1/2)*(-2*sin(x)+2)^(1/2)*(-sin(x))^(1/2)*(2*EllipticE((1+sin(x))^(1/2), 1/2*2^(1/2))-EllipticF((1+sin(x))^(1/2),1/2*2^(1/2))))/(cos(x)*sin(x)^(1/2))

    Simple really.