Use the sliders above to change the shape of the Lissajous curve. Investigate how each slider affects the pattern created. Your mission is the find the settings that produce a perfectly symmetrical (vertically and horizontally) infinity symbol.
For those with a knowledge of trigonometry the parametric equations of the curve currently showing at the top of this page are:
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Many other puzzles are available on this website. There are also an ever increasing number of interactive exercises for students. You can find the collection at