Tangent of the Gerono Curve

x = cos úc
y = sin úc cos úc

References:

  1. Robert C. Yates, A Handbook on Curves and Their Properties, p. 203.

  2. J. Dennis Lawrence. A catalog of special plane curves, pp. 124-126.

See also: http://www.mathcurve.com/courbes2d/gerono/gerono.shtml