Geometry is important in the world of construction.
Construction is just as important in the world of geometry.
Construction is also important in the world of trigonometry. The graphs of the sine and cosine functions can be constructed by a straightforward process.
This simulation allows you to experience that construction.
There is only one control: drag the point at (1, 0) around the circle. You will see the construction in action and learn how the graphs of the sine and cosine functions are related to the unit circle.
The control is duplicated, as there are separate constructions for the sine and cosine functions.
You can drag the point back toward its starting location to get a feel for how the points and segments are related. Good luck and good learning!