# The Definite Integral Inverse Tangent from 0 to Pi over 4

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

The integration of the form is

Here the first function and the second function will be . Using the formula for integration by parts in definite integral form, we have

Equation (i) becomes:

Using the basic rule of definite integral , we have