The equation is .
Compare the polar equation with .
Here and
.
Since , the conic is parabola.
Directrix is perpendicular to the polar axis at a distance to the right of the pole.
Therefore, the vertex is at .
The directrix is .
Construct a table for different values of .
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\Graph:
\(1) Graph the polar co-ordinates.
\(2) Plot the points.
\(3) Connect the points to a smooth curve.
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The conic is parabola.
\The directrix is perpendicular to the polar axis at a distance right to the pole.
The vertex is at .
.