Chapter 4 Exercises Solutions

  1. -2
    1. acute
    2. obtuse
    3. right
  3. 78.6o or 1.37 radians
  4. [-3/7, -3/14, 9/14]
  5. [7, 0, 0]
  6. [-1, -10, 1]
  7. [1, -2, 0]
  8. [-sqrt(2)/2, sqrt(2)/2, 0]