Source: wikibot/list-of-periodic-functions
= List of periodic functions
{wiki=List_of_periodic_functions}
A periodic function is a function that repeats its values at regular intervals or periods. In other words, a function \\( f(x) \\) is periodic with period \\( T \\) if \\( f(x + T) = f(x) \\) for all \\( x \\) in the domain of \\( f \\).