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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 357Page 2 Make trigonometry as easy as 1-2-3 Believe it or not, trigonometry is easier than it looks! With the right help, you can breeze through your next trig class, test, or exam and be ready for your next math challenge. In Trigonometry For Dummies, youll learn to understand the basics of sines, cosines, and tangents, graph functions, solve tough formulas, and even discover how to use trig outside the classroom in some cool and interesting ways. Ditch the confusing jargon and take a plain-English tour of one of the most useful disciplines in math. In this lifesaving guide, youll learn how to: Graph trig functions, including sine, cosine, tangent, and cotangent functions Understand inverse trig functions and solve trig equations Relate triangles to circular functions and get a handle on basic identitiesSo, whether youre looking for an easy-to-use study guide, to boost your math grade, or get a refresher on some basic trig concepts after a long absence from studying, Trigonometry For Dummies is your ticket to understanding the mathematical mysteries of the triangle. 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 © , Amazon.com, Inc. or its affiliates A plain-English guide to the basics of trig Trigonometry deals with the relationship between the sides and angles of triangles...mostly right triangles. In practical use, trigonometry is a friend to astronomers who use triangulation to measure the distance between stars. Trig also has applications in fields as broad as financial analysis, music theory, biology, medical imaging, cryptology, game development, and seismology. From sines and cosines to logarithms, conic sections, and polynomials, this friendly guide takes the torture out of trigonometry, explaining basic concepts in plain English and offering lots of easy-to-grasp example problems. It also explains the why of trigonometry, using real-world examples that illustrate the value of trigonometry in a variety of careers. * Tracks to a typical Trigonometry course at the high school or college level * Packed with example trig problems * From the author of Trigonometry Workbook For Dummies Trigonometry For Dummies is for any student who needs an introduction to, or better understanding of, high-school to college-level trigonometry.

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