# Difference between revisions of "Tschirnhausen Cubic Catacaustic"

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var cubic = brd.create('curve', | var cubic = brd.create('curve', | ||

− | [function(t){ return | + | [function(t){ return a.Value()*3*(t*t-1);}, |

− | function(t){ return a.Value()*t*( | + | function(t){ return a.Value()*t*(t*t-3);}, |

-2, 2 | -2, 2 | ||

], | ], |

## Revision as of 10:57, 13 January 2011

A semicubical parabola is a curve defined parametrically as

- [math] x = t^2 [/math]

- [math] y = at^3 [/math]