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12-25.

For each of the following equations, what are the solutions that lie in the domain ?

  1. You can either draw a unit circle to find all possible solutions, or solve the equation graphically.

    Unit Circle, with radius, drawn to a point on the circle, in first quadrant, labeled, pi sixths, & a radius, drawn to a point on the circle, in second quadrant, labeled, 5 pi sixths.

  1. In what quadrants is cos(x) negative?

    Unit Circle, with radius, drawn to a point on the circle, in third quadrant, labeled, 5 pi sixths, & a radius, drawn to a point on the circle, in third quadrant, labeled, 7 pi sixths.

  1. Picture a unit circle. At what angle is the adjacent side the same length as the hypotenuse?