Mathematics 1B

1. session

Tuesday 8. September 2009
Auditorium M1.80


Introduction to the course. Lecture on Edwards and Penny (E&P) Appendix C, Review of Trigonometry, page A-13 to A-17.
Introduction to the exercises.
Group work on text and exercises.

Exercises for 1. session and 2. session

E&P Appendix C, page A17-A18
Problems no. 1, 3, 7, 9, 11, 15, 17, 21, 26, 29, 37 (don't use the addition formula in part (c))
Prove the following formula:
sin(α)sin(β) = ½ (cos(α–β)–cos(α+β))
Hint: Start with the right hand side of the equation. Use the addition formula for cosine.
E&P Appendix C, page A17-A18
Problems no. 39, 41, 42, 43.


Trigonometric identities involving sine and cosine.
Exact values for sine and cosine of various angles.


Sine and cosine by David Metz
Rotating Phasors by Cory Sharp

Latest update 7. September 2009 by Iver Ottosen