Answer:
3/5
Explanation:
A conic section with a focus at the origin, a directrix of x = ±p where p is a positive real number and positive eccentricity (e) has a polar equation:

Given the conic equation

We have to make the conic equation to be in the form
.

Comparing with
. gives:
e = 3/5, p = 1
The eccentricity is 3/5