The function is $\"\"$ .

Differentiate on each side with respect to $\"\"$ .

$\"\"$

Derivative of the cosecant function $\"\"$ .

$\"\"$

Differentiate on each side with respect to $\"\"$ .

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

$\"\"$ .

Derivative of the cotangent function $\"\"$ . \ \

$\"\"$

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

$\"\"$

$\"\"$ .