The Sum of Two Counter-Rotating Circular Vectors Is an Ellipse

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The two vectors and their sum are shown as black, blue, and red, respectively. You can change the size of the blue vector relative to the black vector; both vectors rotate at the same rate but in opposite directions.

Contributed by: Jaime Rangel-Mondragon (August 2013)
Open content licensed under CC BY-NC-SA




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