Originally Posted by

**drewkx152** Hey amigos :)

Step Functions.. I have quite a few sample problems, however they are all so nice as to have either a full period as the subscript on u, or something like pi/2 so i can convert from sine to cosine.

I'm running into a problem with this one:

Laplace Transform of {u(subscript(pi/4))*e^(3t)*cost}

I have quite a few equations to work with but found them to no avail. My best attempt was using {u(subscript c)(t)*g(t)} = e^(-cs) * Laplace Transform {g(t+c)}

But I find that I am then working with e^(3(t+pi/4))*cos(t-pi/4).. which i simply do not have anything close to those on my tables, and we're not supposed to integrate for these, we're supposed to use the laws..