Hi.

I am stuck on this question and not quite sure how to start it off.

Use convolution to find the Laplace transforms of

a. $\displaystyle f(t) = \int_0^t sin(t - \tau) e^{3 \tau}d\tau$

and b. $\displaystyle f(t) = \int_0^t \sigma(\tau) (t - \tau) d\tau$

.

Maybe I don't understand the whole concept of convolution. Any help would be great.

Thanks!