$\"\"$

\

The function is $\"\"$ .

\

From the trigoometric ratios $\"\"$ .

\

Then $\"\"$ and $\"\"$

\

From the pythagoras theorem $\"\"$ .

\

$\"\"$

\

Therefore $\"\"$ and $\"\"$ .

\

Hence the correct answer is $\"\"$ .

\

$\"\"$

\

The correct answer is $\"\"$ .