$\"\"$

\

The trigonometric expression is $\"\"$ .

\

Apply reciprocal identity: $\"\"$ .

\

$\"\"$

\

Using the scientific calculator : $\"\"$ .

\

Using the Graphing calculator : $\"\"$ .

\

Consider $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Thus, $\"\"$ .

\

$\"\"$

\

The value of $\"\"$ .