Table of Contents

Introduction 1

Part I: Getting Started with Trigonometry 5

Chapter 1: Trouncing Trig Technicalities 7

Chapter 2: Coordinating Your Effor ts with Car tesian Coordinates 29

Chapter 3: Functioning Well 47

Chapter 4: Getting Your Degree 57

Chapter 5: Dishing Out the Pi: Radians 67

Chapter 6: Getting It Right with Triangles 81

Part II: Trigonometric Functions 91

Chapter 7: Doing Right by Trig Functions 93

Chapter 8: Trading Triangles for Circles: Circular Functions 109

Chapter 9: Defining Trig Functions Globally 121

Chapter 10: Applying Yourself to Trig Functions 135

Part III: Identities 155

Chapter 11: Identifying Basic Identities 157

Chapter 12: Operating on Identities 171

Chapter 13: Proving Identities: The Basics 189

Chapter 14: Sleuthing Out Identity Solutions 207

Part IV: Equations and Applications 223

Chapter 15: Investigating Inverse Trig Functions 225

Chapter 16: Making Inverse Trig Work for You 233

Chapter 17: Solving Trig Equations 243

Chapter 18: Obeying the Laws 265

Part V: The Graphs of Trig Functions 289

Chapter 19: Graphing Sine and Cosine 291

Chapter 20: Graphing Tangent and Cotangent 307

Chapter 21: Graphing Other Trig Functions 317

Chapter 22: Topping Off Trig Graphs 329

Part VI: The Part of Tens 343

Chapter 23: Ten Basic Identities . . . Plus Some Bonuses 345

Chapter 24: Ten Not-So-Basic Identities 349

Appendix: Trig Functions Table 353

Index 357

About the Author

Mary Jane Sterling is the author of Algebra I For Dummies and many other For Dummies titles. She has been teaching mathematics at Bradley University in Peoria, Illinois, for more than 30 years and has loved working with future business executives, physical therapists, teachers, and many others.