# Laplace Transform in wolfram

1. Aug 8, 2010

### roshan2004

What is the Laplace Transform of $$f(x)=e^{bx}.sin ax$$?

2. Aug 9, 2010

### hamster143

http://www.wolframalpha.com/input/?i=laplace+transform+of+e^{bx}+sin+ax

3. Aug 9, 2010

### roshan2004

Yes,I have already tried it, but I want to know the process as well.

4. Aug 9, 2010

### hamster143

You write down the integral as $\int e^{(b-s)x} sin ax dx$ and integrate by parts twice.

5. Aug 10, 2010

### adriank

Or you write sin(ax) = (eiax - e-iax)/2i, which is far easier.

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