This can be used to illustrate the symmetry of the graph of [i]y[/i] = sin([i]x[/i]). The graph is symmetric about the origin. This is illustrated by showing that whenever a point ([i]t[/i], sin([i]t[/i])) is on the graph, the point ([i]-t[/i], -sin([i]t[/i])) is also on the graph. Use the slider to change the value of [i]t[/i].
