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epicycloid
The parametric equations of a three-cusped epicycloid are:
x=(a + b) cosΘ - b cos a + b/b
Θ
y = (a + b) sinΘ - b sin a + b/b
Θ
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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