Tangent to a Cycloid

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The cycloid is the locus of a point on a circle rolling along a straight line. This Demonstration illustrates a theorem proved by Descartes: the tangent to the cycloid at a point is perpendicular to
, where
is the point of contact of the circle and the line.
Contributed by: Izidor Hafner (November 2012)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Reference
[1] University of St Andrews Scotland, School of Mathematics and Statistics. The MacTutor History of Mathematics archive. "Cycloid." (Nov 29, 2012) www-history.mcs.st-and.ac.uk/Curves/Cycloid.html.
Permanent Citation
"Tangent to a Cycloid"
http://demonstrations.wolfram.com/TangentToACycloid/
Wolfram Demonstrations Project
Published: November 29 2012