$\"\"$

\

Observe the diagram.

\

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

\

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

\

Acute angle is $\"\"$ .

\

Trigonometric function : $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

Find value of $\"\"$ .

\

If one angle is $\"\"$ , then the other angle is obtained by subtracting $\"\"$ from $\"\"$ .

\

The second angle is $\"\"$ .

\

In right angle triangle the angles are $\"\"$ , $\"\"$ , and $\"\"$ then the sides are $\"\"$ , $\"\"$ and $\"\"$ .

\

Draw diagram using above information.

\

$\"\"$

\

$\"\"$

\

Substitute $\"\"$ in equation (1).

\

$\"\"$

\

$\"\"$

\

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

\

$\"\"$

\

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