$\"\"$

The function is $\"\"$

Consider $\"\"$ .

Apply derivative on each side with respect to $\"\"$ .

$\"\"$

Substitute $\"\"$ and $\"\"$ in the integral function.

$\"\"$

Integral of hyperbolic function : $\"\"$ .

$\"\"$

Substitute $\"\"$ in the above equation.

$\"\"$

Trigonometric property : $\"\"$ .

$\"\"$

$\"\"$

$\"\"$ .