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Inverse Laplace Transformation of Inverse Tan function

  1. Nov 3, 2009 #1
    1. The problem statement, all variables and given/known data

    Take the Inverse Laplace Transform of F(s) where
    F(s)=((s)(tan-1(1/s)))


    2. Relevant equations



    3. The attempt at a solution
    i know that f(t)=L-1(F(s))=(-1/t)L-1(F'(s))
    and d/ds(1/tan-1(x))=1/x^2 +1
    but the example i'm given with an inverse laplace of tan-1 is way prettier than this problem. hint?
     
  2. jcsd
  3. Nov 3, 2009 #2
    Well, the first thing to note is that
    [tex]\tan^{-1}\left(\frac{1}{s}\right)=\cot^{-1}{(s)}.[/tex]​

    Do you know the convolution theorem?

    Also, if you're not going to use latex, please use the "sup" and "sub" buttons (they're the buttons that look like [tex]\text{X}^2[/tex] and [tex]\text{X}_2[/tex]). And make sure you use parentheses for the denominators of fractions. That said, I highly recommend you learn at least some basic latex. It's not very difficult.
     
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