The equation is .
Compare the equation with . \ \
Here and
.
As , the conic is a hyperbola.
Now .
Substitute .
.
Directrix: . \ \
Directrix is perpendicular to the polar axis at a distance to the right of the pole.
The polar equation represents a hyperbola.
\Directrix is perpendicular to the polar axis at a distance to the right of the pole.