# Thread: Inverse Laplace Transform

1. ## Inverse Laplace Transform

Please help me to find an inverse Laplace Transform :

$L^{-1}\left(\frac{p}{(p^2+a^2)^2}\right)$

$(i)\quad\mathcal{L}\{f(t)\}=F(p)\Rightarrow\mathca l{L}\{tf(t)\}=-\dfrac{d}{dp}F(p)$
$(ii)\quad \mathcal{L}\{\sin bt\}=\dfrac{b}{p^2+b^2}$