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Navigational directions for ships and planes are sometimes given as bearings, which are angles measured from .

    °     Quadrant     °   Show work on scratch paper.  

          Show work on scratch paper.  

      Show work on scratch paper.

The period of the sine and cosine functions is °. Their midline is the horizontal line y = , and their amplitude is .   The tangent function has period °. It is undefined at multiples of ° and is increasing on each interval of its domain.

  °   °   Show work on scratch paper.