The late Marge Lial was always interested in math; it was her favorite subject in the first grade! Marge's intense desire to educate both her students and herself has inspired the writing of numerous best-selling textbooks. Marge, who received Bachelor's and Master's degrees from California State University at Sacramento, was affiliated with American River College. An avid reader and traveler, her travel experiences often found their way into her books as applications, exercise sets, and feature sets. Her interest in archeology led to trips to various digs and ruin sites, producing some fascinating problems for her textbooks involving such topics as the building of Mayan pyramids and the acoustics of ancient ball courts in the Yucatan.

When John Hornsby enrolled as an undergraduate at Louisiana State University, he was uncertain whether he wanted to study mathematics education or journalism. His ultimate decision was to become a teacher, but after 25 years of teaching at the high school and university levels and 15 years of writing mathematics textbooks, both of his goals have been realized. His love for both teaching and for mathematics is evident in his passion for working with students and fellow teachers as well. His specific professional interests are recreational mathematics, mathematics history, and incorporating graphing calculators into the curriculum. John's personal life is busy as he devotes time to his family (wife Gwen, and sons Chris, Jack, and Josh), and has been an avid baseball fan all of his life. John's other hobbies include numismatics (the study of coins) and record collecting. He loves the music of the 1960s and has an extensive collection of the recorded works of Frankie Valli and the Four Seasons.

David Schneider, who is known widely for his tutorial software, holds a BA degree from Oberlin College and a PhD from MIT. He is currently an emeritus professor of mathematics at the University of Maryland. He has authored 8 widely used math texts, 14 highly acclaimed computer books, and 3 widely used mathematical software packages. He has also produced instructional videotapes at both the University of Maryland and the BBC.

Callie Daniels has always had a passion for learning mathematics and brings that passion into the classroom with her students. She attended the University of the Ozarks where she earned a bachelor's degree in Secondary Mathematics Education. She has two master's degrees: one in Applied Mathematics and Statistics from the University of Missouri - Rolla, the second in Adult Education from the University of Missouri - St. Louis. Her professional interests include improving success in the community college mathematics sequence, using technology to enhance students' understanding of mathematics, and creating materials that support classroom teaching and student understanding. She is able to pursue these interests as a contributor on the Lial Developmental Math series, and a co-author on the Precalculus series.

• R-1 Fractions, Decimals, and Percents
• R-2 Sets and Real Numbers
• R-3 Real Number Operations and Properties
• R-4 Integer and Rational Exponents
• R-5 Polynomials
• R-6 Factoring Polynomials
• R-7 Rational Expressions
• R-8 Radical Expressions

• 1-1 Linear Equations
• 1-2 Applications and Modeling with Linear Equations
• 1-3 Complex Numbers
• 1-4 Quadratic Equations
• 1-5 Applications and Modeling with Quadratic Equations
• 1-6 Other Types of Equations and Applications
• 1-7 Inequalities
• 1-8 Absolute Value Equations and Inequalities

• 2-1 Rectangular Coordinates and Graphs
• 2-2 Circles
• 2-3 Functions
• 2-4 Linear Functions
• 2-5 Equations of Lines and Linear Models
• 2-6 Graphs of Basic Functions
• 2-7 Graphing Techniques
• 2-8 Function Operations and Composition

• 3-1 Quadratic Functions and Models
• 3-2 Synthetic Division
• 3-3 Zeros of Polynomial Functions
• 3-4 Polynomial Functions: Graphs, Applications, and Models
• 3-5 Rational Functions: Graphs, Applications, and Models
• 3-6 Polynomial and Rational Inequalities
• 3-7 Variation

• 4-1 Inverse Functions
• 4-2 Exponential Functions
• 4-3 Logarithmic Functions
• 4-4 Evaluating Logarithms and the Change-of-Base Theorem
• 4-5 Exponential and Logarithmic Equations
• 4-6 Applications of Models of Exponential Growth and Decay

• 5-1 Angles
• 5-2 Trigonometric Functions
• 5-3 Trigonometric Function Values and Angle Measures
• 5-4 Solutions and Applications of Right Triangles

• 6-1 Radian Measure
• 6-2 The Unit Circle and Circular Functions
• 6-3 Graphs of the Sine and Cosine Functions
• 6-4 Translations of the Graphs of the Sine and Cosine Functions
• 6-5 Graphs of the Tangent and Cotangent Functions
• 6-6 Graphs of the Secant and Cosecant Functions
• 6-7 Harmonic Motion

• 7-1 Fundamental Identities
• 7-2 Verifying Trigonometric Identities
• 7-3 Sum and Difference Identities
• 7-4 Double-Angle and Half-Angle Identities
• 7-5 Inverse Circular Functions
• 7-6 Trigonometric Equations
• 7-7 Equations Involving Inverse Trigonometric Functions

• 8-1 The Law of Sines
• 8-2 The Law of Cosines
• 8-3 Geometrically Defined Vectors and Applications
• 8-4 Algebraically Defined Vectors and the Dot Product
• 8-5 Trigonometric (Polar) Form of Complex Numbers; Products and Quotients
• 8-6 De Moivre's Theorem; Powers and Roots of Complex Numbers
• 8-7 Polar Equations and Graphs
• 8-8 Parametric Equations, Graphs, and Applications

• 9-1 Systems of Linear Equations
• 9-2 Matrix Solution of Linear Systems
• 9-3 Determinant Solution of Linear Systems
• 9-4 Partial Fractions
• 9-5 Nonlinear Systems of Equations
• 9-6 Systems of Inequalities and Linear Programming
• 9-7 Properties of Matrices
• 9-8 Matrix Inverses

• 10-1 Parabolas
• 10-2 Ellipses
• 10-3 Hyperbolas
• 10-4 Summary of the Conic Sections

• 11-1 Sequences and Series
• 11-2 Arithmetic Sequences and Series
• 11-3 Geometric Sequences and Series
• 11-4 The Binomial Theorem
• 11-5 Mathematical Induction
• 11-6 Basics of Counting Theory
• 11-7 Basics of Probability

• A. Polar Form of Conic Sections
• B. Rotation of Axes
• C. Geometry Formulas