# Periodic Function

Periodic function repeats its values in regular interval. The regular interval is referred to as the period. A function is said to be periodic if it gives same value after a same period. And functions which are not periodic are called aperiodic.

Trigonometric functions are the most important examples of the periodic functions. There is repetition of function values with respect to independent variable.

Not only in the field of mathematics but these functions are used throughout science to describe waves, periodicity and oscillations etc. In this section we will learn about periodic function.