$\"\"$

Find value of expession $\"\"$ .

If one angle is $\"\"$ , then we can get other angle by subtracting given angle from $\"\"$ .

The second angle is $\"\"$ .

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

Draw diagram using above information.

$\"\"$

The trigonometric function : $\"\"$ .

$\"\"$

$\"\"$ .