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 (2*x* + 3) :

In this case, the period is: *p* = 2π.