# Difference between revisions of "Tschirnhausen Cubic Catacaustic"

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Line 12: | Line 12: | ||

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

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

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

-2, 2 | -2, 2 |

## Revision as of 11:56, 13 January 2011

A semicubical parabola is a curve defined parametrically as

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

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