The Tangent line and the Unit Circle

The applet uses the unit circle to demonstrate how the relationship between sine, cosine and tangent varies as the central angle changes.[br]The Unit Circle has a diameter of one unit and is centred at x-y coordiates of 0,0
Drag point P to see how the relationship between sine, cosine and tangent varies
– KJ, Chris Wells

Information: The Tangent line and the Unit Circle