In Exercises 5β18, the unit circle has been divided into twelve equal arcs, corresponding to t-values of
0, π, π, π, 2π, 5π, π, 7π, 4π, 3π, 5π, 11π, and 2π.
6 3 2 3 6 6 3 2 3 6
Use the (x,y) coordinates in the figure to find the value of each trigonometric function at the indicated real number, t, or state that the expression is undefined.
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In Exercises 11β18, continue to refer to the figure at the bottom of the previous page.
sec 3π/2