What trigonometric identity is informally being illustrated in the applet below? (Feel free to move the white point wherever you'd like!)
[math]tan\left(-x\right)=-tan\left(x\right)[/math] for all inputs (i.e. "angles") [i]x[/i]. [br][br]Because of this, we can say that the tangent function is an [b]odd function.[/b]