Evaluate : `int sec x tan x sqrt(4 sec^(2) x- 1) dx`

Explanation

To evaluate the integral \( I = \int \sec x \tan x \sqrt{4 \sec^2 x - 1} \, dx \), we can follow these steps:

### Step 1: Simplify the integrand
We start with the integral:
\[ I = \int \sec x \tan x \sqrt{4 \sec^2 x - 1} \, dx \]
Notice that we can rewrite the square root:
...