The point in rectangular coordinates is
and interval is
.
Find pair of points in polar coordinates.
\Coversion formula :
and
.
Find
.
Substitute
in the conversion formula of polar coordinates.


Find
.
Since
and
,then
.

.
The point in polar coordinate is
.
Find the second pair of polar coordinate.
\One set of polar coordinates is
.
Another representation that uses a negative
-value is
or 
The point in polar coordinate is
.
Pair of polar points are
and
.