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7-90.

Calculate the value of each expression below. Give an exact measurement, if possible. Each measure is given in radians. Homework Help ✎

  1. sin(4)

  2. sin()

Make sure your calculator is in radian mode.

Since  is related to the  angles, this one has an exact answer.  Locate it on the unit circle. Notice that it will be a reflection (twice) of sin .

It is in the third quadrant.

−0.76

unit circle