Tangent of Trisectrix of Catalan
r = sec3£c/3
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Cartesian Equation : |
27ay2 = x2(x+9a) |
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Parametric Equation : |
x = 3a(t2- 3) , y = at (t2- 3) |
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Polar Equation : |
r = sec3£c/3 |
References
Robert C. Yates, A Handbook on Curves and Their Properties, p. 205
J. Dennis Lawrence. A catalog of special plane curves, pp. 88-90.
2d Curves : http://www.2dcurves.com/cubic/cubicn.html
Math World : http://mathworld.wolfram.com/TrisectrixofCatalan.html