Step 1:

Trigonometric value is $\"\"$ .

Find $\"\"$ .

Double - Angle Formulas: $\"\"$ .

Substitute $\"\"$ in the double angle formula.

$\"\"$

Step 2:

Find $\"\"$ .

Consider right angle triangle $\"\"$ .

From the Pythagorean theorem: $\"\"$ .

Substitute $\"\"$ and $\"\"$ .

$\"\"$

Thus, $\"\"$ .

Double - Angle Formulas: $\"\"$ .

Substitute $\"\"$ and $\"\"$ in the double angle formula.

$\"\"$

Solution :

The values are $\"\"$ and $\"\"$