Properties of Tangent

Can you recognize some of the properties of a Tangent function using this applet? See if this applet can help you discover solutions for the questions below
As you move the large white point what do you notice happens to the purple and green lines? What does the relationship between the tan(x) and the -tan(x) tell you about tangent? Can you tell if the function is ood or even? What does the Range of the tan(x) function tell you?