TRIGONOMETRIC FUNCTIONS Basic Graphs (Page 13 of 14)

Finally, we will graph the cotangent function. Turn off function Y5 and turn on function Y6 in the function editor, then graph.

 Y= key.
 Left arrow key. Down arrow key. Down arrow key. Down arrow key. Down arrow key. ENTER key.
 Down arrow key. ENTER key.

 GRAPH key.

 Calculator screen image. Calculator screen image.

Observe that the period is π, there are zeros at odd multiples of π/2, vertical asymptotes occur at integer multiples of π, and the range is all real numbers. Again, the vertical line segments are artificial; although they serve to remind us of the asymptotes, they are not part of the graph.
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