1. Lesson 4

1.6. Explore 5

Mathematics 30-1 Module 5

Module 5: Trigonometry Applications and Identities

 

glossary

Add the following terms to your copy of Glossary Terms:

  • sum identity
  • difference identity
  • double-angle identity

formula

Add the following identities to your copy of Formula Sheet:

  • sin (A + B) = sin A cos B + cos A sin B
  • cos (A + B) = cos A cos B − sin A sin B
  • sin (A − B) = sin A cos B − cos A sin B
  • cos (A − B) = cos A cos B + sin A sin B
  • sin 2A = 2 sin A cos A
  • cos 2A = cos2 A − sin2 A
  • cos 2A = 2 cos2 A − 1
  • cos 2A = 1 − 2 sin2 A