Wednesday, January 21 – The Cosine Ratio

  • Attendance
    • Sit where you want
    • Keys found at back of classroom
  • Trigonometry quiz on Friday
    • Optional – will not lower your mark
    • You can write it during the turnaround days on Monday/Tuesday if you want more time to prepare
  • Go over homework question
  • The Sine Ratio
    • Go over pages 289-291, questions 1 to 8
  • The Cosine Ratio
    • Vocabulary: opposite, adjacent, hypotenuse, complementary
    • Page 293-294: Explore the Math
    • Page 294-297: As a class, do examples 1-3
    • Homework: p. 297-299, questions 1 to 8
  • Wrap-up
    • Tomorrow: the tangent ratio
    • Friday: optional trigonometry quiz – can write on Monday/Tuesday if you want more time to prepare