3-10 Finding a Polar Equation for a Conic Write a polar equation of a conic that has its focus at the origin and satisfies the given conditions.
The polar equation of a parabola.
The directrix of the parabola is .
The directrix is , it is to the above to the focus. Thus the polar equation of parabola is …
The eccentricity of the parabola is always 1.
Substituting for and for in equation as follows.
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