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## Overview

PRECALCULUS: REAL MATHEMATICS, REAL PEOPLE, 7th Edition, is an ideal student and instructor resource for courses that require the use of a graphing calculator. The quality and quantity of the exercises, combined with interesting applications and innovative resources, make teaching easier and help students succeed. Retaining the series' emphasis on student support, selected examples throughout the text include notations directing students to previous sections to review concepts and skills needed to master the material at hand. The book also achieves accessibility through careful writing and design—including examples with detailed solutions that begin and end on the same page, which maximizes readability. Similarly, side-by-side solutions show algebraic, graphical, and numerical representations of the mathematics and support a variety of learning styles. Reflecting its subtitle, this significant revision focuses more than ever on showing students the relevance of mathematics in their lives and future careers.

- New LarsonPrecalculus.com: This companion website offers free access to multiple tools and resources that supplement student learning. Students can view and listen to worked-out solutions of Checkpoint problems in English or Spanish, download data sets, explore examples, watch lesson videos, and much more.
- New Chapter Opener: Each Chapter Opener highlights real-life applications used in the examples and exercises.
- New How Do You See It?: The How Do You See It? feature in each section presents a real-life exercise that students solve by visual inspection using the concepts learned in the lesson. This exercise is excellent for classroom discussion or test preparation.
- New Checkpoints: Accompanying every example, the Checkpoint problems encourage immediate practice and check students' understanding of the concepts presented in the example. Students can view and listen to worked-out solutions of the Checkpoint problems in English or Spanish at LarsonPrecalculus.com.
- New Data Spreadsheets: Downloadable, editable spreadsheets from LarsonPrecalculus.com let students use the data to solve exercises.

- Revised Remark: These hints and tips reinforce or expand upon concepts, help students learn how to study mathematics, address special cases, or show alternative or additional steps to a solution of an example.
- Why You Should Learn It Exercise: An engaging real-life application of the concepts in the section. This application exercise is typically described in the section opener as a motivator for the section.
- Library of Parent Functions: To facilitate familiarity with the basic functions, a Library of Parent Functions contains several elementary and non-elementary functions. Each function is introduced at the first point of use in the text with a definition and description of basic characteristics. The Library of Parent Functions Examples are identified in the title of the example and there is a Review of Library of Parent Functions after Chapter 4. A summary of functions is presented on the inside cover of this text.
- Make a Decision Exercises: The Make a Decision exercises at the end of selected sections involve in-depth applied exercises in which the student will work with large, real-life data sets, often creating or analyzing models. These exercises are offered online at LarsonPrecalculus.com.
- Explore the Concept: Each Explore the Concept engages students in active discovery of mathematical concepts, strengthens critical thinking skills, and helps build intuition.
- What's Wrong: Each What's Wrong points out common errors made using graphing utilities.
- Technology Tip: Technology Tips provide graphing calculator tips or provide alternate methods of solving a problem using a graphing utility.
- Algebra of Calculus: Throughout the text, special emphasis is given to the algebraic techniques used in calculus. Algebra of calculus examples and exercises are integrated throughout the text.
- Algebraic-Graphical-Numerical Exercises: These exercises allow students to solve a problem using multiple approaches: algebraic, graphical, and numerical. This helps students see that a problem can be solved in more than one way and that different methods yield the same result.
- Modeling Data Exercises: These multi-part applications involve real-life data and offer students the opportunity to generate and analyze mathematical models.
- Vocabulary and Concept Check: The Vocabulary and Concept Check appears at the beginning of the exercise set for each section. Each of these checks asks fill-in-the-blank, matching, and non-computational questions designed to help students learn mathematical terminology and to test basic understanding of that section's concepts.

Introduction to Library of Functions.

1.1 Lines in the Plane. 1.2 Functions. 1.3 Graphs of Functions. 1.4 Shifting, Reflecting, and Stretching Graphs. 1.5 Combinations of Functions. 1.6 Inverse Functions. 1.7 Linear Models and Scatter Plots. Chapter Summary. Review Exercises. Chapter Test. Proofs in Mathematics.

2. POLYNOMIAL AND RATIONAL FUNCTIONS.

2.1 Quadratic Functions. 2.2 Polynomial Functions of Higher Degree. 2.3 Real Zeros of Polynomial Functions. 2.4 Complex Numbers. 2.6 Rational Functions and Asymptotes. 2.7 Graphs of Rational Functions. 2.8 Quadratic Models. Chapter Summary. Review Exercises. Chapter Test. Proofs in Mathematics. Progressive Summary (Chapters 1 and 2).

3. EXPONENTIAL AND LOGARITHMIC FUNCTIONS.

3.1 Exponential Functions and Their Graphs. 3.2 Logarithmic Functions and Their Graphs. 3.3 Properties of Logarithms. 3.4 Solving Exponential and Logarithmic Equations. 3.5 Exponential and Logarithmic Models. 3.6 Nonlinear Models. Chapter Summary. Review Exercises. Chapter Test. Cumulative Test: Chapters 1-3. Proofs in Mathematics. Progressive Summary (Chapters 1-3).

4. TRIGONOMETRIC FUNCTIONS.

4.1 Radian and Degree Measure. 4.2 Trigonometric Functions: The Unit Circle. 4.3 Right Triangle Trigonometry. 4.4 Trigonometric Functions of Any Angle. 4.5 Graphs of Sine and Cosine Functions. 4.6 Graphs of Other Trigonometric Functions. 4.7 Inverse Trigonometric Functions. 4.8 Applications and Models. Chapter Summary. Review Exercises. Chapter Test. Library of Parent Functions Review.

Proofs in Mathematics.

5. ANALYTIC TRIGONOMETRY.

5.1 Using Fundamental Identities. 5.2 Verifying Trigonometric Identities. 5.3 Solving Trigonometric Equations. 5.4 Sum and Difference Formulas. 5.5 Multiple-Angle and Product-to-Sum Formulas. Chapter Summary. Review Exercises. Chapter Test. Proofs in Mathematics.

6. ADDITIONAL TOPICS IN TRIGONOMETRY.

6.1 Law of Sines. 6.2 Law of Cosines. 6.3 Vectors in the Plane. 6.4 Vectors and Dot Products. 6.5 Trigonometric Form of a Complex Number. Chapter Summary. Review Exercises. Chapter Test. Cumulative Test: Chapters 4-6. Proofs in Mathematics.

Progressive Summary (Chapters 1-6).

7. LINEAR SYSTEMS AND MATRICES.

7.1 Solving Systems of Equations. 7.2 Systems of Linear Equations in Two Variables. 7.3 Multivariable Linear Systems. 7.4 Matrices and Systems of Equations. 7.5 Operations with Matrices. 7.6 The Inverse of a Square Matrix. 7.7 The Determinant of a Square Matrix. 7.8 Applications of Matrices and Determinants. Chapter Summary. Review Exercises. Chapter Test. Proofs in Mathematics.

8. SEQUENCES, SERIES, AND PROBABILITY.

8.1 Sequences and Series. 8.2 Arithmetic Sequences and Partial Sums. 8.3 Geometric Sequences and Series. 8.4 The Binomial Theorem. 8.5 Counting Principles. 8.6 Probability. Chapter Summary. Review Exercises. Chapter Test. Proofs in Mathematics.

9. TOPICS IN ANALYTIC GEOMETRY.

9.1 Conics: Circles and Parabolas. 9.2 Ellipses. 9.3 Hyperbolas and Rotation of Conics.

9.4 Parametric Equations. 9.5 Polar Coordinates. 9.6 Graphs of Polar Equations.

9.7 Polar Equations of Conics. Chapter Summary. Review Exercises. Chapter Test.

Cumulative Test: Chapters 7-9.Proofs in Mathematics. Progressive Summary (Chapters 3-9).

10. ANALYTIC GEOMETRY IN THREE DIMENSIONS.

10.1 The Three-Dimensional Coordinate System. 10.2 Vectors in Space. 10.3 The Cross Product of Two Vectors. 10.4 Lines and Planes in Space. Chapter Summary. Review Exercises. Chapter Test. Proofs in Mathematics.

Appendix A: Technology Support Guide.

Appendix B: Review of Graphs, Equations, and Inequalities (WEB only).

B.1 The Cartesian Plane. B.2 Graphs of Equations. B.3 Solving Equations Algebraically and Graphically. B.4 Solving Inequalities Algebraically and Graphically.

B.5 Representing Data Graphically.

Appendix C: Concepts in Statistics (WEB only).

C.1 Measures of Central Tendency and Dispersion. C.2 Least Squares Regression.

Appendix D: Variation (WEB only).

Appendix E: Solving Linear Equations and Inequalities (WEB only).

Appendix F: Systems of Inequalities (WEB only).

F.1 Solving Systems of Inequalities. F.2 Linear Programming.

Appendix G: Mathematical Induction (WEB only).

Cengage provides a range of supplements that are updated in coordination with the main title selection. For more information about these supplements, contact your Learning Consultant.

### FOR INSTRUCTORS

#### Electronic Test Bank

ISBN: 9781305117525

#### Online PowerPoint® + Instructor's Companion Web Site: Precalculus: Real Mathematics, Real People, 7th

ISBN: 9781305279605

Everything you need for your course in one place! This collection of book-specific lecture and class tools is available online via www.cengage.com/login. Access and download PowerPoint presentations, images, instructor's manual, and more.

#### Cengage Learning Testing, powered by Cognero® Instant Access (1-year access): Precalculus: Real Mathematics, Real People, 7th

ISBN: 9781305257115

Cengage Learning Testing Powered by Cognero is a flexible, online system that allows you to author, edit, and manage test bank content; create multiple test versions in an instant; and deliver tests from your LMS, your classroom or wherever you want. This is available online via www.cengage.com/login.

#### Student Solutions Manual

ISBN: 9781305117112

Contains fully worked-out solutions to all of the odd-numbered exercises in the text, giving students a way to check their answers and ensure that they took the correct steps to arrive at an answer.

#### Text Specific DVD: Precalculus: Real Mathematics, Real People, 7th

ISBN: 9781305117143

These text-specific DVDs cover all sections of the text—providing explanations of key concepts as well as examples, exercises, and applications in a lecture-based format.

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