Click the green flag, and watch. Blue is Sine Green is Cosine Yellow is Tangent
This demonstrates the curves of the three different trigometric functions. Sine is the Opposite divided by the Hypotenuse, Cosine is the Adjacent divided by the Hypotenuse, and Tangent is the Opposite divided by the Adjacent. One way to remember this is SOHCAHTOA. Thanks to Scubajerry for helping with picking the pen up for the transition to the different curves