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## Homework Statement

Find inverse Laplace transform of:

s/((s^2)+1)^2

## Homework Equations

## The Attempt at a Solution

The answer is:

(t/2)sin t

First shifting theorem or partial fractions don't work, I think. From a Laplace transforms table, sin at = a/((s^2)+(a^2)), which is almost the form that the problem is in.

Thanks