The function is $\"\"$ .

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

$\"\"$

Derivative of a secant function : $\"\"$ .

$\"\"$ .

$\"\"$ .

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

$\"\"$ .

Product rule of derivatives : $\"\"$ .

$\"\"$

Derivative of a tangent function is : $\"\"$ .

Derivative of a secant function is : $\"\"$ .

$\"\"$

Trigonometric Identity : $\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$ .