# Question #4323f

##### 3 Answers

#### Explanation:

Assuming

#### Explanation:

I assume that you want to find the integral of the tangent function, or

First, using trigonometric identities, rewrite it to

Now, we need to use u-substitution. For this, it would be best if we could find some expression in the integrand that can be substituted to a single variable and which derivative, when divided into the integrand, can simplify so that no

In this example, we will choose

Then, we have

This is simply

Substitute back

#### Explanation:

Firstly, we shall let

So our integral is

Now let