Date: May 14, 2013 3:42 PM
Author: Narasimham
Subject: Tough locus

Find locus of a point P moving along a curve  whose tangent is inclined to two rays from A and B ( distance 2 c apart) at angles satisfying  cos(alpha)/cos{beta) = m ( a constant). Special case is ellipse for m = 1.

TIA
Narasimham