\"\"

\

The trigonometric identity is \"\".

\

Consider \"\".

\

Apply double-angle formula: \"italic.

\

\"\"

\

Apply Pythagorean identity: \"Syntax.

\

\"\"

\

Apply double-angle formula: \"italic.

\

\"\"

\

\"\"

\

\"\"

\

Divide the numerator and denominator with \"\".

\

\"\"

\

Reciprocal identity : \"\".

\

\"\"

\

\"\".

\

\"\"

\

\"\".