V vice lord New Member Joined Sep 28, 2009 Messages 19 Gender Male HSC 2009 Nov 5, 2009 #1 A circle passing though the origin O is tangent to the hyperbola xy = 1 at A , and intersects the hyperbola again at 2 distinct points B and C . Prove OA is perpendicular to BChttp://www.intmath.com/Plane-analytic-geometry/xyis1.gif
A circle passing though the origin O is tangent to the hyperbola xy = 1 at A , and intersects the hyperbola again at 2 distinct points B and C . Prove OA is perpendicular to BChttp://www.intmath.com/Plane-analytic-geometry/xyis1.gif
jet Banned Joined Jan 4, 2007 Messages 3,148 Gender Male HSC 2009 Nov 6, 2009 #2 This is not actually a locus question, just so you know.