 21.1: The graph in Figure 21c is the sine function (pronounced like sign...
 21.2: The graphs in Figures 21b and 21c are called sinusoids (pronounce...
 21.3: Enter in your grapher an appropriate equation for the sinusoid in F...
 21.4: Explain how an angle can have measure of more than 180. Explain the...
Solutions for Chapter 21: Introduction to Periodic Functions
Full solutions for Precalculus with Trigonometry: Concepts and Applications  1st Edition
ISBN: 9781559533911
Solutions for Chapter 21: Introduction to Periodic Functions
Get Full SolutionsChapter 21: Introduction to Periodic Functions includes 4 full stepbystep solutions. This expansive textbook survival guide covers the following chapters and their solutions. Precalculus with Trigonometry: Concepts and Applications was written by and is associated to the ISBN: 9781559533911. Since 4 problems in chapter 21: Introduction to Periodic Functions have been answered, more than 21468 students have viewed full stepbystep solutions from this chapter. This textbook survival guide was created for the textbook: Precalculus with Trigonometry: Concepts and Applications, edition: 1.

Acute triangle
A triangle in which all angles measure less than 90°

Algebraic expression
A combination of variables and constants involving addition, subtraction, multiplication, division, powers, and roots

Arcsecant function
See Inverse secant function.

Blocking
A feature of some experimental designs that controls for potential differences between subject groups by applying treatments randomly within homogeneous blocks of subjects

Bounded
A function is bounded if there are numbers b and B such that b ? ƒ(x) ? B for all x in the domain of f.

Coefficient matrix
A matrix whose elements are the coefficients in a system of linear equations

Constant of variation
See Power function.

equation of a hyperbola
(x  h)2 a2  (y  k)2 b2 = 1 or (y  k)2 a2  (x  h)2 b2 = 1

Even function
A function whose graph is symmetric about the yaxis for all x in the domain of ƒ.

Inverse cosine function
The function y = cos1 x

Lower bound for real zeros
A number c is a lower bound for the set of real zeros of ƒ if ƒ(x) Z 0 whenever x < c

Median (of a data set)
The middle number (or the mean of the two middle numbers) if the data are listed in order.

Onetoone function
A function in which each element of the range corresponds to exactly one element in the domain

Parallel lines
Two lines that are both vertical or have equal slopes.

Probability simulation
A numerical simulation of a probability experiment in which assigned numbers appear with the same probabilities as the outcomes of the experiment.

Quadratic formula
The formula x = b 2b2  4ac2a used to solve ax 2 + bx + c = 0.

Quotient polynomial
See Division algorithm for polynomials.

Statistic
A number that measures a quantitative variable for a sample from a population.

Upper bound test for real zeros
A test for finding an upper bound for the real zeros of a polynomial.

Vertex form for a quadratic function
ƒ(x) = a(x  h)2 + k