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Periodic function

Revision as of 11:14, 3 March 2007 by JBL (talk | contribs)
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We say that a single-variable function $f$ is periodic with period $p$ if for all $x$, $f(x + p) = f(x)$. The most common examples of periodic functions are the trigonometric functions sine and cosine, which are periodic with period $2\pi$.

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