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Trigonometry For Dummies, 3rd Edition
book

Trigonometry For Dummies, 3rd Edition

by Mary Jane Sterling
March 2023
Beginner content levelBeginner
400 pages
9h 38m
English
For Dummies
Content preview from Trigonometry For Dummies, 3rd Edition

Chapter 10

Introducing Basic Identities

IN THIS CHAPTER

Bullet Recognizing reciprocal identities

Bullet Putting functions head-over-tails by using ratio identities

Bullet Performing attitude adjustments on negative angles

Bullet Relating functions to Pythagoras’s way of thinking

Bullet Using multiple identities to simplify matters

I’m sure a thousand questions are running through your mind: What’s a trig identity? Is it possible to have a mistaken trig identity? Does anyone commit trig-identity theft? Can you have an identity crisis with trig? The answer: No — probably not.

Trig identities aren’t nearly as sinister as you may think. They’re actually very helpful tools in simplifying trig expressions and solving equations. These identities are special to trigonometry. Basically, they’re equivalences — they give you options to substitute into equations in order to simplify. For example, wouldn’t you rather use the number 1 than ? Of course! In most cases, the number 1 is simpler. That’s how trig identities work — they ...

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Publisher Resources

ISBN: 9781394168552Purchase Link