1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Laplace Transform question

  1. Mar 9, 2009 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
    so the answer says it's b/(s^2-b^2)

    but get get that far.. here's what i have



    = 1/2[e^((s-b)t)-e^((s+b)t)]
  2. jcsd
  3. Mar 9, 2009 #2


    User Avatar
    Homework Helper

    first sinh(bt)=(e^bt-e^-bt))/2

    not sure what you are doing here, I just went to the Tables & see
    [tex] L(e^{-\alpha t}}) = \frac{1}{s+\alpha} [/tex]

    can you show this? and use it?
  4. Mar 9, 2009 #3
    yeah, we weren't supposed to use the table...
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook