UNIT CIRCLE Circular Functions (Page 8 of 10)

 ALPHA X key. x to the -1 key. ENTER key.

 ALPHA Y key. x to the -1 key. ENTER key.

 Calculator screen image.

You can see that sec(5π/6 ) is approximately -1.1547 and csc(5π/6 ) is approximately 2.

The unit circle can also be graphed using degree measure instead of radian measure. To do this, first change from Radian mode to Degree mode. The change can be made on the MODE screen.

 MODE key. [Degree] ENTER key. Calculator screen image.
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