1.   Solve the equation cos x = .
    A. x equals 60°, 300° or any angle
coterminal with these angles.
    B. x equals 150°, 210° or any angle
coterminal with these angles.
    C. x equals 30°, 330° or any angle
coterminal with these angles.
    D. x equals 120°, 240° or any angle
coterminal with these angles.
    Hint

  2.   Evaluate sin (arctan ). Assume that the angle is in Quadrant I.
    A. B.
    C. D.
    Hint

  3.   If f = 9 and d = 13, find the measure of .
   
    A. about 43.8° B. about 55.3°
    C. about 34.7° D. about 46.2°
    Hint

  4.   A security light is being installed outside a loading dock. The light is mounted 25 feet above the ground. The light must be placed at an angle so that it illuminates a parking lot. If the end of the parking lot is 125 feet from the loading dock, what should be the angle of depression of the light?
    A. about 78.5° B. about 78.7°
    C. about 11.5° D. about 11.3°
    Hint

  5.   If A = 39° and b = 7.2, find c.
   
    A. about 8.9 units B. about 5.6 units
    C. about 9.3 units D. about 11.4 units
    Hint