The Cosine and the Unit Circle
- Author:
- Chris Wells
- Topic:
- Circle, Cosine, Trigonometry, Unit Circle
The applet uses the unit circle to demonstrate how the cosine varies as the central angle changes.
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 cosine value varies with angle θ