The trigonometric equation is $\"\"$ , on the interval $\"\"$ .

$\"\"$

Subtract $\"\"$ from each side.

$\"\"$

$\"\"$ .

The general solution of $\"\"$ is $\"\"$ , where $\"\"$ is an integer.

$\"\"$

The general solution is $\"\"$ .

If $\"\"$ then $\"\"$ .

The solutions on the $\"\"$ are $\"\"$ .

$\"\"$ .