Results 1 to 8 of 8

Math Help - integration with sin

  1. #1
    Junior Member
    Joined
    Feb 2009
    Posts
    45

    integration with sin

    how do i integrate this 1 / [(sin x) - 1]
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,905
    Thanks
    1757
    Awards
    1
    Quote Originally Posted by crafty View Post
    how do i integrate this 1 / [(sin x) - 1]
    \frac{1}{{\sin \left( x \right) - 1}} = \frac{{\sin (x) + 1}}<br />
{{ - \cos ^2 (x)}} = \frac{{ - \sin (x)}}<br />
{{\cos ^2 (x)}} - \sec ^2 (x)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Feb 2009
    Posts
    45
    how did you convert into those forms can you be a bit more explicit in your description???
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,905
    Thanks
    1757
    Awards
    1
    Quote Originally Posted by crafty View Post
    how did you convert into those forms can you be a bit more explicit in your description???
    \left( {\frac{1}<br />
{{\sin \left( x \right) - 1}}} \right)\left( {\frac{{\sin \left( x \right) + 1}}<br />
{{\sin \left( x \right) + 1}}} \right) = ??
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Feb 2009
    Posts
    45
    and how do i integrate (sin x)/1(cos x)^2??? do i change into tan form? and if so how do i proceed then??
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,905
    Thanks
    1757
    Awards
    1
    \frac{du}{u^2}
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Math Engineering Student
    Krizalid's Avatar
    Joined
    Mar 2007
    From
    Santiago, Chile
    Posts
    3,654
    Thanks
    13
    I think you mean 1+\cos^2x, so yes, put u=\cos x and you'll get an arctangent.
    Follow Math Help Forum on Facebook and Google+

  8. #8
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by crafty View Post
    how do i integrate this 1 / [(sin x) - 1]
    The same question (more or less) here: http://www.mathhelpforum.com/math-he...tegration.html
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: November 3rd 2010, 01:54 AM
  2. Replies: 2
    Last Post: November 2nd 2010, 05:57 AM
  3. Replies: 8
    Last Post: September 2nd 2010, 01:27 PM
  4. Replies: 2
    Last Post: February 19th 2010, 11:55 AM
  5. Replies: 6
    Last Post: May 25th 2009, 07:58 AM

Search Tags


/mathhelpforum @mathhelpforum