Hello, I did a forum search and I think this is the correct place to post this. There seem to be a lot of other posts in here on this topic. The question is this:

Find the complex Fourier series of the sawtooth wave

and where

So, I'm trying to use the equation:

where

But I'm not getting the answer I'm expecting. I'm not sure what the limits of the integral should be. As the function is not defined for t<0, can I just put:

Or do I need to do something to balance out the fact that the equation doesn't run across the origin...? I'm confused....

Thanks very much in advance.