Find the Laplace transform, indicating the region of convergence of the integrals involved: $\displaystyle L^{-1}\{s^{-1}(s^2 + 9)^{-1}\}$
Follow Math Help Forum on Facebook and Google+
The inverse LaPlace is $\displaystyle \frac{1-cos(3t)}{9}$ That'll give you something to shoot for.
View Tag Cloud