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# Solutions for Chapter 4.3: Right Triangle Trigonometry

## Full solutions for Precalculus | 4th Edition

ISBN: 9780321559845

Solutions for Chapter 4.3: Right Triangle Trigonometry

Solutions for Chapter 4.3
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##### ISBN: 9780321559845

This expansive textbook survival guide covers the following chapters and their solutions. Precalculus was written by and is associated to the ISBN: 9780321559845. Since 83 problems in chapter 4.3: Right Triangle Trigonometry have been answered, more than 70654 students have viewed full step-by-step solutions from this chapter. Chapter 4.3: Right Triangle Trigonometry includes 83 full step-by-step solutions. This textbook survival guide was created for the textbook: Precalculus, edition: 4.

Key Calculus Terms and definitions covered in this textbook
• Arithmetic sequence

A sequence {an} in which an = an-1 + d for every integer n ? 2 . The number d is the common difference.

• Binomial coefficients

The numbers in Pascal’s triangle: nCr = anrb = n!r!1n - r2!

• Boxplot (or box-and-whisker plot)

A graph that displays a five-number summary

• Common ratio

See Geometric sequence.

• Convenience sample

A sample that sacrifices randomness for convenience

• DMS measure

The measure of an angle in degrees, minutes, and seconds

• Equivalent arrows

Arrows that have the same magnitude and direction.

• Frequency distribution

See Frequency table.

• Invertible linear system

A system of n linear equations in n variables whose coefficient matrix has a nonzero determinant.

• Limit at infinity

limx: qƒ1x2 = L means that ƒ1x2 gets arbitrarily close to L as x gets arbitrarily large; lim x:- q ƒ1x2 means that gets arbitrarily close to L as gets arbitrarily large

• Numerical model

A model determined by analyzing numbers or data in order to gain insight into a phenomenon, p. 64.

An equation that can be written in the form ax 2 + bx + c = 01a ? 02

• Richter scale

A logarithmic scale used in measuring the intensity of an earthquake.

• Secant

The function y = sec x.

• Semimajor axis

The distance from the center to a vertex of an ellipse.

• Standard form of a polynomial function

ƒ(x) = an x n + an-1x n-1 + Á + a1x + a0

• Standard form: equation of a circle

(x - h)2 + (y - k2) = r 2

• Sum of a finite arithmetic series

Sn = na a1 + a2 2 b = n 2 32a1 + 1n - 12d4,

• Unit vector

Vector of length 1.

• Venn diagram

A visualization of the relationships among events within a sample space.

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