Solved: For a point P on an ellipse, let d be the distance from the center of the
Chapter 10, Problem 129(choose chapter or problem)
For a point P on an ellipse, let d be the distance from the center of the ellipse to the line tangent to the ellipse at P. Prove that is constant as P varies on the ellipse, where and are the distances from P to the foci and of the ellipse.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer