Precalculus 2014
The rectangular equation is .
Rewrite the equation:.
The equation is in the form of standard equation of parabola .
Here, and .
The eccentricity of a parabola is .
The directrix of vertical parabola is .
Substitute and .
.
If the directrix is a horizontal line , then the polar equation of the conic is .
The directrix is .
Substitute and in .
.
The polar equation is .
The polar equation is .
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