Periodicity
The period of a periodic CT function of the form $ e^{j(\omega_0t+\phi)} $ or $ cos(\omega_0t+\phi) $ is easy to find. This is due to the fact that every different value for the fundamental frequency $ \omega_0 $ corresponds to a unique function with period $ T=\frac{2\pi}{\omega_0} $.
--Asiembid 10:09, 22 July 2009 (UTC)