A latus rectum for an ellipse is a line segment perpendicular to the major axis at a focus, with endpoints on the ellipse, as shown in the figure. y Latus rectum -a Foci Show that the length of a latus rectum is 262/a for the ellipse a> b. The foci of the given ellipse are (?v, 0), where c = a - b. If the endpoints of one latus rectum are the points (c, tk), then the length of one latus rectum is Substitute one of the endpoints into the given equation for the ellipse and solve for k. a2 22 k2 = Substitute b2 for 32 - 2. 22 k = Thus, the length of a latus rectum for the given ellipse is 2k =
A latus rectum for an ellipse is a line segment perpendicular to the major axis at a focus, with endpoints on the ellipse, as shown in the figure. y Latus rectum -a Foci Show that the length of a latus rectum is 262/a for the ellipse a> b. The foci of the given ellipse are (?v, 0), where c = a - b. If the endpoints of one latus rectum are the points (c, tk), then the length of one latus rectum is Substitute one of the endpoints into the given equation for the ellipse and solve for k. a2 22 k2 = Substitute b2 for 32 - 2. 22 k = Thus, the length of a latus rectum for the given ellipse is 2k =
Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter12: Conic Sections
Section12.2: Ellipses
Problem 64E: How Wide Is an Ellipse at a Focus? A latus rectum for an ellipse is a line segment perpendicular to...
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