- #1

glasshut137

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**[SOLVED] conic sections in polar coordinates**

## Homework Statement

write a polar equation of a conic with the focus at the origin and the given data.

i know it's an ellipse with eccentricity 0.8 and vertex (1, pie/2)

## The Attempt at a Solution

my question is: how do I find the directrix using the vertex and the focus point?