This is the eighth tutorial of the GeoGebra Intermediate Tutorial Series. If this is your first time to use GeoGebra, you might want to read the GeoGebra Essentials Series.

In this tutorial, we use the *Input bar *to create mathematical objects particularly a circle, an arc, and a point that traces the sine and cosine function. In doing the tutorial, we learn the following:

- use the GeoGebra keyboard commands to construct various geometric objects
- use the GeoGebra trace function
- change the interval of the
*x*-axis