The coordinates of A and B are expressed in terms of sin and cos of [math]\theta[/math]. [br]By varying the angle with the slider, points on the unit circle (or related to it) will be generated. [br]You may click the coordinates in the algebra window to reveal or edit the expressions. [br][br]Experiment with the tracing of segment to make different patterns.

You can find a special example of pattern made in this way:[br][url=https://www.geogebra.org/m/aCjWafaN]https://www.geogebra.org/m/aCjWafaN[/url] [br][br]What other interesting patterns can you create?