Periodic function

An illustration o a periodic function wi period $P.$

In mathematics, a periodic function is a function that repeats its values in regular intervals or periods. The maist important examples are the trigonometric functions, which repeat ower intervals o 2π radians. Periodic functions are uised throughoot science tae describe oscillations, waves, an ither phenomena that exhibit periodicity. Ony function which is nae periodic is cried aperiodic.