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Math Help - Integrate

  1. #1
    mms
    mms is offline
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    Integrate

    using u-substitution

    <br />
\int {\frac{{\tan (x)}}<br />
{{\ln (sin(x))}}} dx<br /> <br />

    thanks!
    Last edited by mms; September 16th 2009 at 08:11 AM. Reason: sine=seno in spanish xD
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  2. #2
    MHF Contributor
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    Question

    What function is represented by "sen(x)"? I'm not familiar with this notation...?
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  3. #3
    Super Member redsoxfan325's Avatar
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    Quote Originally Posted by mms View Post
    using u-substitution

    <br />
\int {\frac{{\tan (x)}}<br />
{{\ln (sin(x))}}} dx<br /> <br />

    thanks!
    This integral has no closed form. If \sin x was \cos x or if \tan x was \cot x, then it would be. Is it possible that there's a typo in the problem?
    Last edited by redsoxfan325; September 16th 2009 at 11:37 AM.
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  4. #4
    Math Engineering Student
    Krizalid's Avatar
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    Quote Originally Posted by redsoxfan325 View Post

    This is not integrable.
    don't abuse of the language! we should say "no closed form, no primitive."
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  5. #5
    Super Member redsoxfan325's Avatar
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    OK.
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