Posers and Puzzles

Posers and Puzzles

  1. Joined
    08 Sep '06
    Moves
    785
    08 Sep '06 15:21
    how do u integrate square root of sinx.
  2. SubscriberSuzianne
    Misfit Queen
    Isle of Misfit Toys
    Joined
    08 Aug '03
    Moves
    35961
    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. SubscriberAThousandYoung
    iViva la Hispanidad!
    tinyurl.com/y2c6j2t3
    Joined
    23 Aug '04
    Moves
    24791
    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 memberPBE6
    Bananarama
    False berry
    Joined
    14 Feb '04
    Moves
    28719
    08 Sep '06 18:021 edit
    Originally posted by The Avenger
    how do u integrate square root of sinx.
    Handy website:

    http://integrals.wolfram.com/index.jsp
  5. Joined
    20 Feb '06
    Moves
    8407
    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. Joined
    21 Jul '04
    Moves
    13381
    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. Standard membersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
    28 Dec '04
    Moves
    52874
    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. Joined
    21 Jul '04
    Moves
    13381
    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 memberXanthosNZ
    Cancerous Bus Crash
    p^2.sin(phi)
    Joined
    06 Sep '04
    Moves
    25076
    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.
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