The equation is
.
Subtract
from each side.

Subtract
from each side.

Apply reciprocal identity :
.

Solve
.

The general solution of
is
, where
is an integer.
The solution is
, where
is an integer.
Now find the solutions on the interval
.
If
,
.
If
,
.
If
,
.
Thus, the solutions are
,
,
, and
on the interval
.
The solutions are
,
,
, and
on the interval
.