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Converting from T-domain to S-domain?

  1. Oct 10, 2009 #1
    1. The problem statement, all variables and given/known data

    convert T-domain to S-domain

    F(t)= e^-4t *sin10t

    2. Relevant equations



    3. The attempt at a solution

    sin10t converted to 10/[(S^2)+100]

    but how can i convert e^-4t ?
     
  2. jcsd
  3. Oct 10, 2009 #2
  4. Oct 10, 2009 #3
    Thank you,

    I know exp(-at) on s-domain will be L2p9a.jpg

    But is the Alpha sign a constant, to replace it with a value?
     
  5. Oct 10, 2009 #4
    I just took a closer look at that table, I'm not sure why they used a and alpha. Basically this should be:

    [tex]\mathcal{L}\left(e^{-at})\right = \frac{1}{s+a}[/tex]

    Hope that helps,

    Ryan
     
  6. Oct 11, 2009 #5
    Solved ,, Thank You ,

    Have a nice day
     
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