The curves are
and
.
Graph the curves
and
.
Observe the graph:
\The curves intersect on interval
.
Find the intersection points by equating the two curves.
\



Sine function is positive in first and second quadrant.
\
.
Substitute
in
.


.
Substitute
in
.


.
The points of intersection are
and
.
Both curves passes through the pole, so pole is also a point of intersection.
\At the pole:
.


.


.
The points of intersection are
,
and the pole.