I was wondering if someone can give me a hand finding the Fourier Series Coefficients of the function f(t) = Acos(wt) .

I tried using the following definition

Xn = 1/T integral ( f(t) e^-jwnt )

I converted the cos(wt) to its exponential form, then multiplied and combined and integrated.. however it sorta kept going on and on and doesn't seem to end :S

does anyone have a link of the explanation on how to solve this.. ?

thanks guys