TRIGONOMETRIC FUNCTIONS Basic Graphs (Page 5 of 14)

Use the FnOff command without any other parameters to prevent all of the functions from being graphed. Then use the FnOn command and specify the number 2 to select function Y2 to be graphed. Notice on the function editor screen that only Y2 has the equal sign highlighted now. Then press GRAPH to see the graph of Y2.

 2nd QUIT key. CLEAR key.

 VARS key. Right arrow key. 4: menu selection. 2: menu selection. ENTER key.
 VARS key. Right arrow key. 4: menu selection. 1: menu selection. 2 ENTER key.

 Calculator screen image.
 Y= key.

 GRAPH key.

 Calculator screen image. Calculator screen image.

The graph of the cosine function is now displayed. Observe that the period is 2π, there are zeros at odd multiples of π/2, and the range is [-1, 1].
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