Step 1:

\

The expression is $\"\"$ .

\

Simplify the expression.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Pythagorean identity $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Cancel common terms.

\

$\"\"$

\

$\"\"$ .

\

Solution:

\

$\"\"$ .