A helpful scientific calculator that runs in your web browser window.
Holt Online Learning
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This page gives a chart summarizing the equations of the conic sections: circle, hyperbola, parabola and ellipse.
Math 2.org
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In this video, Salman Khan of Khan Academy finds the foci of an ellipse.
Khan Academy
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Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
Paul's Online Math Notes
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Article on ellipses. Above the level of most students, but useful for the tutor.
MathWorld
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A site with step by step tutorials on how to draw and graph a variety of mathematical functions
Analyze Math
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Online graphing calculator, useful for drawing out a function to visualize it or find key points.
http://www.coolmath.com
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Shows 3-D diagram of the 4 types of conic sections. Explains how to use determinant to establish the type of section.
Spark Notes
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A tutorial which includes a video and several examples for graphing ellipses and writing ellipses equations.
Algebra Lab
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A breakdown of all the major conic sections on one webpage with their general equations and graphs. It includes information on parabolas, circles, ellipses, and hyperbolas.
James Jones' College Algebra Lecture Notes (Math 116)
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