TRIGONOMETRIC EQUATIONS Solving Equations (Page 11 of 11)

There are two solutions to the equation within the given domain, as indicated by the two intersection points. We will use a guess of 90 for the left intersection point, and a guess of 300 for the right intersection point.

 2nd CALC key. 5: menu selection.
 ENTER key. (Mark the first graph)
 ENTER key. (Mark the second graph)
 90 ENTER key.		 Calculator screen image.
 2nd CALC key. 5: menu selection.
 ENTER key. (Mark the first graph)
 ENTER key. (Mark the second graph)
 300 ENTER key.		 Calculator screen image.

The two solutions are x = 90° and x = 330°.
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