CHAPTER4

Trigonometry: Last Stop Before Calculus

In This Chapter

  • Characteristics of periodic functions
  • The six trigonometric functions
  • The importance of the unit circle
  • Key trigonometric formulas and identities

Trigonometry, the study of triangles, has been around for a long time, creeping mysteriously from shadow to shadow and occasionally snatching unwary students into its razor-sharp clutches and causing the end of their mathematics careers. Few things cause people to panic like trig does, with the exception of TV weatherman Al Roker.

It is a commonly held belief that children on All Hallow’s Eve historically have marched from door to door, ...

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