*g*(*x*) = A × cos(*B* × *x* + *C*) + *D*

**READ** the instructions on the *right* and **INTERACT** with the C.a.R. applet below.

Created by Steven Lapinski using the Compass and Ruler (C.a.R.) java program.

## Investigation Steps

To RESET the construction, click on the browser's Refresh button.

**Basic Trig Relationships**

Move points *A*, *B*, *C*, and *D* and determine how they change the graph.

What happens when *A* is zero?

What happens when *B* is zero?