Evaluate of each of the following integral:

Let us assume .....equation 1

By property, we know that

Thus

We know tan(– x) = – tan x

......equation 2

Adding equations 1 and equation 2, we get,

We know

Trigonometric identity sec² ɵ

We know

Thus

We know

Thus

We know b and a being the upper and lower limits respectively.

Since

Thus