Defining Trig Functions
Basic Trigonometric Figures
How to Divide a Line Segment into Multiple Parts

How to Recognize Basic Trig Graphs

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The graph of y = sin x.

The graph of the sine function is a nice, continuous wave that rolls along gently and keeps repeating itself. The domain, or x-values, of the sine function includes all angles in degrees or all real numbers in radians, so the curve has no breaks or holes.

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