Results 1 to 2 of 2

Math Help - help with a hard trig integration

  1. #1
    Member
    Joined
    Sep 2009
    Posts
    105

    help with a hard trig integration

    ok, i am almost positive this is going to end up involving an inverse trig function, since thats the section its in

    ive been going at it for a while and cant get anything to work

    (integral) 1/((x-a)(b-x)) dx b=/=a


    it says Hint: x-a= (b-a)(sin^2 u)
    i plugged that in, and got little help.. any help is greatly appreciated as always
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Banned
    Joined
    Oct 2009
    Posts
    4,261
    Quote Originally Posted by twostep08 View Post
    ok, i am almost positive this is going to end up involving an inverse trig function, since thats the section its in

    ive been going at it for a while and cant get anything to work

    (integral) 1/((x-a)(b-x)) dx b=/=a


    it says Hint: x-a= (b-a)(sin^2 u)
    i plugged that in, and got little help.. any help is greatly appreciated as always

    \frac{1}{(x-a)(b-x)}=\frac{1}{b-a}\left(\frac{1}{x-a}-\frac{1}{x-b}\right)

    I can't understand what's sine's business here...

    Tonio
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. please help me with hard trig identity
    Posted in the Pre-Calculus Forum
    Replies: 5
    Last Post: February 16th 2011, 08:51 PM
  2. Hard Trig Proof
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: June 23rd 2010, 06:07 PM
  3. Really Hard Trig Equation
    Posted in the Trigonometry Forum
    Replies: 6
    Last Post: December 16th 2009, 02:55 AM
  4. 2 hard trig problems
    Posted in the Trigonometry Forum
    Replies: 4
    Last Post: December 16th 2009, 01:39 AM
  5. Hard Trig Sub Need Help asap
    Posted in the Calculus Forum
    Replies: 4
    Last Post: June 23rd 2009, 09:40 PM

Search Tags


/mathhelpforum @mathhelpforum