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# Solutions for Chapter 8.1: THE ADDITION FORMULAS

## Full solutions for Precalculus: With Unit Circle Trigonometry (with Interactive Video Skillbuilder CD-ROM) (Available 2010 Titles Enhanced Web Assign) | 4th Edition

ISBN: 9780534402303

Solutions for Chapter 8.1: THE ADDITION FORMULAS

Solutions for Chapter 8.1
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##### ISBN: 9780534402303

This expansive textbook survival guide covers the following chapters and their solutions. This textbook survival guide was created for the textbook: Precalculus: With Unit Circle Trigonometry (with Interactive Video Skillbuilder CD-ROM) (Available 2010 Titles Enhanced Web Assign), edition: 4. Since 85 problems in chapter 8.1: THE ADDITION FORMULAS have been answered, more than 25535 students have viewed full step-by-step solutions from this chapter. Precalculus: With Unit Circle Trigonometry (with Interactive Video Skillbuilder CD-ROM) (Available 2010 Titles Enhanced Web Assign) was written by and is associated to the ISBN: 9780534402303. Chapter 8.1: THE ADDITION FORMULAS includes 85 full step-by-step solutions.

Key Calculus Terms and definitions covered in this textbook
• Angle

Union of two rays with a common endpoint (the vertex). The beginning ray (the initial side) can be rotated about its endpoint to obtain the final position (the terminal side)

• Coefficient of determination

The number r2 or R2 that measures how well a regression curve fits the data

• Combinatorics

A branch of mathematics related to determining the number of elements of a set or the number of ways objects can be arranged or combined

• Cone

See Right circular cone.

• Coordinate(s) of a point

The number associated with a point on a number line, or the ordered pair associated with a point in the Cartesian coordinate plane, or the ordered triple associated with a point in the Cartesian three-dimensional space

• Dependent variable

Variable representing the range value of a function (usually y)

• Differentiable at x = a

ƒ'(a) exists

• Directed line segment

See Arrow.

• Equilibrium price

See Equilibrium point.

• Expanded form of a series

A series written explicitly as a sum of terms (not in summation notation).

• Factor

In algebra, a quantity being multiplied in a product. In statistics, a potential explanatory variable under study in an experiment, .

• Least-squares line

See Linear regression line.

• n factorial

For any positive integer n, n factorial is n! = n.(n - 1) . (n - 2) .... .3.2.1; zero factorial is 0! = 1

• nth root of unity

A complex number v such that vn = 1

• Orthogonal vectors

Two vectors u and v with u x v = 0.

• Product of a scalar and a vector

The product of scalar k and vector u = 8u1, u29 1or u = 8u1, u2, u392 is k.u = 8ku1, ku291or k # u = 8ku1, ku2, ku392,

• Product of complex numbers

(a + bi)(c + di) = (ac - bd) + (ad + bc)i

• Slope

Ratio change in y/change in x

A graph in which (x, -y) is on the graph whenever (x, y) is; or a graph in which (r, -?) or (-r, ?, -?) is on the graph whenever (r, ?) is

• xy-plane

The points x, y, 0 in Cartesian space.

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