# The Definite Integral of Tanx from 0 to Pi over 4

In this tutorial we shall derive the definite integral of the trigonometric function tangent from limits 0 to Pi over 4.

The integration of the form is

First we evaluate this integration by using the integral formula , and then we use the basic rule of the definite integral . So we have

From the trigonometric values

and , we have

Using the value , we have