$\"\"$

\

Observe the diagram.

\

The trigonometric function : $\"\"$ .

\

The acute angle is $\"\"$ .

\

The length of adjacent side to $\"\"$ is $\"\"$ .

\

The length of hypotenuse is $\"\"$ .

\

$\"\"$

\

$\"\"$

\

The value of $\"\"$ is $\"\"$ .

\

$\"\"$

\

The value of $\"\"$ is $\"\"$ .