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
.