$\"\"$

The trigonometric equation is $\"\"$ and $\"\"$ in QII. \ \

Consider $\"\"$ .

$\"\"$

Multiply each side by $\"\"$ .

$\"\"$

Apply inverse property : $\"\"$ .

$\"\"$

Using the calculator : $\"\"$ .

$\"\"$ .

Since the desired angle is in QII, the sine function is positive and the reference angle of $\"\"$ . $\"\"$

The angle is $\"\"$ .