\"\"

\

The expression is \"\".

\

Consider \"\".

\

\"\"

\

Rewrite the expression as least common denominator.

\

\"\"

\

Apply Pythagorean identity : \"\".

\

\"\"

\

Apply reciprocal identity : \"\".

\

\"\"

\

Apply reciprocal identity : \"\".

\

\"\"

\

Thus, \"\".

\

\"\"

\

\"\".