\"\"

\

(a) \"\"

\

The trigonometric function is \"\".

\

Reciprocal identity : \"\".

\

\"\".

\

\"\"

\

(b) \"\"

\

Pythagorean identity: \"\".

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

Reciprocal identity: \"\"

\

\"\" . 

\

\

\"\"

\

(c) \"\"

\

Co - function identity : \"\".

\

\"\".

\

\

\"\"

\

(d) \"\"

\

Apply Pythagorean identity: \"\".

\

\"\"

\

\"\"

\

\"\"

\

\"\" 

\

\"\"  

\

\

\"\" 

\

\

\"\".\"\"

\

(a) \"\",

\

(b) \"\",

\

(c) \"\", and

\

(d) \"\".