Figure 12.15 illustrates what happens if you calculate the sine values of the angles depicted in Figure 12.14. To make it so that the graph provides a fuller representation of the way that the values fluctuate from positive to negative, the range has been extended beyond that of a single rotation of a circle. The extension of the range does not affect the overall pattern.

The overall pattern assumes a value of 0 at the origin—which represents an angle of 0. If you move to the right, ...

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