Date: Nov 18, 2013 9:07 AM Author: Narasimham Subject: Re: Locus for ratio of cosine of angles to be constant Typos..
dr/ds - dx/ds ecc = 0 which integrates to
r - x ecc = r - r cos(th) ecc = p, an arbitrary constant.
1 - ecc cos(th) = p/r the polar equation of all conics.
Given constant is eccentricity and arbitrary constant
p is semi-latus rectum.