 8.4.A.1: D
 8.4.A.2: B
 8.4.A.3: A
 8.4.A.4: C#
 8.4.A.5: Using only one tuning fork at a time and the sumof three functions,...
 8.4.A.6: Using three tuning forks for the notes C, E, and Gat one time, find...
Solutions for Chapter 8.4.A: Excursion: Sound Waves
Full solutions for Precalculus  1st Edition
ISBN: 9780030416477
Solutions for Chapter 8.4.A: Excursion: Sound Waves
Get Full SolutionsSince 6 problems in chapter 8.4.A: Excursion: Sound Waves have been answered, more than 23915 students have viewed full stepbystep solutions from this chapter. Precalculus was written by and is associated to the ISBN: 9780030416477. Chapter 8.4.A: Excursion: Sound Waves includes 6 full stepbystep solutions. This textbook survival guide was created for the textbook: Precalculus, edition: 1. This expansive textbook survival guide covers the following chapters and their solutions.

Angle of elevation
The acute angle formed by the line of sight (upward) and the horizontal

Bounded below
A function is bounded below if there is a number b such that b ? ƒ(x) for all x in the domain of f.

Complex fraction
See Compound fraction.

Control
The principle of experimental design that makes it possible to rule out other factors when making inferences about a particular explanatory variable

Deductive reasoning
The process of utilizing general information to prove a specific hypothesis

Difference identity
An identity involving a trigonometric function of u  v

Horizontal translation
A shift of a graph to the left or right.

Inverse function
The inverse relation of a onetoone function.

Law of sines
sin A a = sin B b = sin C c

Lemniscate
A graph of a polar equation of the form r2 = a2 sin 2u or r 2 = a2 cos 2u.

Limit
limx:aƒ1x2 = L means that ƒ(x) gets arbitrarily close to L as x gets arbitrarily close (but not equal) to a

Midpoint (in Cartesian space)
For the line segment with endpoints (x 1, y1, z 1) and (x2, y2, z2), ax 1 + x 22 ,y1 + y22 ,z 1 + z 22 b

Multiplication property of equality
If u = v and w = z, then uw = vz

Product of complex numbers
(a + bi)(c + di) = (ac  bd) + (ad + bc)i

Radius
The distance from a point on a circle (or a sphere) to the center of the circle (or the sphere).

Repeated zeros
Zeros of multiplicity ? 2 (see Multiplicity).

Solve graphically
Use a graphical method, including use of a hand sketch or use of a grapher. When appropriate, the approximate solution should be confirmed algebraically

Spiral of Archimedes
The graph of the polar curve.

Symmetric property of equality
If a = b, then b = a

Xscl
The scale of the tick marks on the xaxis in a viewing window.