1.   Use the unit circle to find sec (-180°).
    A. -1 B. 0
    C. 1 D. undefined
    Hint

  2.   Use the unit circle to find the value of cos 120°.
    A. B.
    C. D. -2
    Hint

  3.   Find the value of for an angle in standard position if a
point with coordinates (-12, 5) lies on its terminal side.
    A. B.
    C. D.
    Hint

  4.   Suppose is an angle in standard position whose terminal side
lies in Quadrant II. If , find
    A. B.
    C. D.
    Hint

  5.   The terminal side of one angle in standard position contains the point with coordinates (3, -2). The terminal side of another angle in standard position contains the point with coordinates (-3, 2). Compare the tangents of these angles.
    A. They are equal. B. They are not equal.
    C. One does not exist. D. One is twice the other.
    Hint