Step 1 :

Find the trigonometric expression is $\"\"$ .

From the data $\"\"$ .

If $\"\"$ , then $\"\"$ .

From the figure : $\"\"$ .

Pythagorean theorem : $\"\"$ .

$\"\"$

The trigonometric function : $\"\"$ .

$\"\"$ .

Solution :

The algebraic form of the expression $\"\"$ is $\"\"$ .