Hi..i need to determine the inverse laplace of F(s)=((s^2)-(∏^2)) / ((s^2)+(∏^2))^2..........by either differentiation or integration of Transforms method..L{tf(t)}= -F'(s)...or......L{f(t)/t}=∫F(s).ds(the limit is from 0 to ∞) ......i know the inverse laplace of this s-domain function is t cos(∏t) but i cant figure out a way to show this through either of the two methods mentioned.plz help thanks

 

Hello,

You already have a thread for this in the homework section:
http://forum.allaboutcircuits.com/showthread.php?t=46858

Bertus