TRIGONOMETRIC EQUATIONS Solving Equations (Page 6 of 11)

 Y= key. CLEAR key.

 SIN key. 3 X,T,theta,n key. Right parenthesis key. ENTER key.
 2nd Square root key. 2 Right parenthesis key. Divide key. 2

 Calculator screen image.

We will set the window to a normal period of 360° and allow for the usual range of -1 to 1 (with some additional space).

 WINDOW key....

 GRAPH key.

 Calculator screen image. Calculator screen image.

Observe that each cycle of the sine function will intersect the constant function twice, and that three cycles are completed as x varies from 0° to 360° because of the horizontal compression.
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