The Fourier Series Of This Triangle Wave I am using matlab to study digital signalling and have come across a problem which i was wondering if anyone with more experience could help me with.

I need to work derive the Fourier series of a triangle wave that i have generated, I just do not know how to actually go about this problem in Matlab.

I am generating a 100hz Triangle signal using the following code:

t = 0:1/10000:1;
f=100;
x1 = sawtooth(2*pi*f*t, 0.5);
plot(t,x1); 
axis([0 0.10 -1 1]); 


Now how should i go about deriving the Fourier series of this signal, i am completely lost.

Any help would be appreciated.
Check out Wikipedia's Fourier Series page.  Their "Example 1" shows how to derive the Fourier series of a sawtooth wave.  All you have to do is normalize the results for your particular time and amplitude values.