http://www.mindbites.com/series/309 for a bundle of videos on Ellipses. For an even broader bundle of videos that cover Ellipses and other Conic Sections, check out http://www.mindbites.com/series/307 . To search for topic-specific help in our library of 400+ video products for Trigonometry & Pre-Calculus, please refer to our Trigonometry category at: http://www.mindbites.com/category/31-trigonometry and our Calculus Category at http://www.mindbites.com/category/23-calculus . To check out our full Trig & Pre-Cal video course, with 150 videos included, refer to: http://www.mindbites.com/series/845-trigonometry-full-course . Or, for access to this single video, go to: http://www.mindbites.com/lesson/808-college-algebra-finding-equations-for-ellipses An ellipse is a collection of points whose combined distance from two fixed points (both called a focus) are the same. This lesson will show you how to find the equation of an ellipse if you know some information but not all of it. The equation for this type of conic section is typically written as: x^2/a^2 + y^2/b^2 = 1. We start with a situation where you know the x-intercepts and the foci (both focuses) but are looking for the equation of the ellipse. To approach this problem, we'll use triangle formulas and the Pythagorean Theorem to find the y-intercept. Taught by Professor Edward Burger, this lesson was selected from broader, comprehensive courses covering Trigonometry and College Algebra.
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