For 37 and 38, use the values of sin 15 and cos 15 from 33 and 34, with appropriate simplification, to show that these numerical expressions are exact values of tan 15 and cot 15.

Biology102StudyGuidefortheFinalExam Chapters24,28,34,31 Chapter24–Chordates - Characteristics o Tailbeyondanus o Dorsalnotochord o Dorsalnervechord o Pharynxwithgillslits - Invertebratechordates o Tunicatesorseasquirts o Lancelets - Chordates o Craniatechordate - VertebrateCharacteristics o 1)Endoskeleton o 2)Tetrapods o 3)Amniotes o 4)Greatercephalization o 5)Lungs o 6)Pairedappendages o 7)Encasedeggs o Jawlessvertebrates § Lampreysandhagfishes o Jawedvertebrates § Everythingelse - Chondricht