This unit explores equivalent trigonometric expressions and examines strategies to prove trigonometric identities and solve a variety of trigonometric equations. Knowledge of fundamental trigonometric identities will be extended to include compound angle and double angle formulas.

 The chapter ends with some of the trig formulas that will be helpful to evaluate trig expressions exactly instead of getting approximations from our calculators. These formulas will be used heavily next year in Calculus.

                                               Chapter 4 - Unit Circle Check list

4.1 A – Radians & Arc Length

4.1 B – Standard and Coterminal Angles 17

4.2– The Unit Circle

4.3A – Reference Angles 17

4.3B – Trigonometry Ratios (Primary& Secondary) key

4.4A – Trigonometry Equations

4.4B – Trigonometric Equations (General Solution)

CH. 4 Unit Circle Problems