# Period of a Periodic Function

## Period of a Periodic Function

In a periodic function f, the least positive value of the parameter p for which we have f(x+p) = f(x).

The period is a synonym for the wavelength.

### Example

Here is the graph of the function defined by f(x) = 3sin (x) + cos (2x + 3) :

In this case, the period is: p = 2π.