Choose a graph to trace: Sine, Cosine, or both
Click on Start Animation to begin or stop the trace.
You may also drag the orange point around the circle to manually trace the curves.

Given y = sin(x), each point on the curve is given by (x, sin(x)).
Each point on the curve y = cos(x) is given by (x,cos(x)).
Investigation: Graph both y = sin(x) and y = cos(x) simultaneously. How is the graph of y = sin(x) related to the graph of y = cos(x)?
This is a modification of the GeoGebra applet created by Winzeler_BASIS.