That is not good enough.  You need to do more problems before retrying this
  review.  I suggest you do the following:
  1) Obtain a copy of the Schaum's Outline "Trigonometry" by F. Ayres, Jr.
  2) Carefully study pages 68 - 72 and then do problems 24 - 43.
  3) Carefully study pages 74 - 82 and then do problems 28, 32, 34.
  4) Carefully study pages 125 - 130 and then do problems 31 - 42.