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| − | \ cos(x) = \sum_{n=0}^\infty \left ( | + | \ cos(x) = \sum_{n=0}^\infty \left (-1 \right )^n |
</math> | </math> | ||
Revision as of 13:21, 26 September 2008
The function y(t) in this example is the periodic continuous-time signal cos(x) such that
$ y(t) = \ cos(x) $
where cos(x) can be expressed by the Maclaurin series expansion
$ \ cos(x) = \sum_{n=0}^\infty \left (-1 \right )^n $
where its Fourier series coefficients are described by the equation
$ \left ( \frac{1}{jk\omega_0} \right )a_k = \left ( \frac{1}{jk \left (2\pi/T \right)} \right )a_k $
