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

In this tutorial we shall derive the definite integral of the trigonometric function secant 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 . We have

From the trigonometric values and , we have