$\"\"$

The functions are $\"\"$ and $\"\"$ .

Find the exact value of the composite function $\"\"$ .

$\"\"$

Apply co-function identity : $\"\"$ .

$\"\"$

Apply inverse trigonometric identity : $\"\"$ .

$\"\"$

Therefore, $\"\"$ $\"\"$ .

$\"\"$

The exact value of $\"\"$ is $\"\"$ .