$\"\"$

\

The trigonometric equation is $\"\"$ .

\

$\"\"$

\

Apply reciprocal identity : $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

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

\

$\"\"$

\

First solve $\"\"$ .

\

$\"\"$

\

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

\

The general solution is $\"\"$ .

\

$\"\"$

\

Now solve $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

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

\

The general solution is $\"\"$ .

\

$\"\"$

\

The solutions are $\"\"$ and $\"\"$ .