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Keep This Java Cheat Sheet on Hand While You're Learning to Code
Calculus Derivatives and Limits Reference Sheet - Includes Chain Rule, Product Rule, Quotient Rule, Definition of Derivatives, and even the Mean Value Theorem. Great resources for those in Calculus 1 or even AP Calculus AB.
Hypotrochoid - A roulette traced by a point attached to a circle of radius (r) rolling around inside the fixed circle of radius (R) where the point is a distance (d) from the center of the interior circle