\

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

\

$\"\"$

\

Subtract $\"\"$ from each side.

\

$\"\"$

\

Divide each side by $\"\"$ .

\

$\"\"$

\

$\"\"$

\

The general solution of $\"\"$ then $\"\"$ ,

\

where $\"\"$ is an integer.

\

$\"\"$ .

\

The general solution is $\"\"$ .

\

\

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

\

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

\

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

\

Solutions of $\"\"$ in the interval $\"\"$ are $\"\"$ .

\

\

$\"\"$ .