Precalculus: With Unit Circle Trigonometry (with Interactive Video Skillbuilder CD-ROM) (Available 2010 Titles Enhanced Web Assign) 4th Edition - Solutions by Chapter

det(xIn - A), where A is an n x n matrix

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

See Cartesian coordinate system.

The function y = sin-1 x

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

A graph of data in which consecutive data points are connected by line segments

A scatter plot with points clustered along a line. Correlation is positive if the slope is positive and negative if the slope is negative

A distribution of data shaped like the normal curve.

The line through P0(x 0, y0, z 0) in the direction of the nonzero vector v = <a, b, c> has parametric equations x = x 0 + at, y = y 0 + bt, z = z0 + ct.

The collection of probabilities of outcomes in a sample space assigned by a probability function.

tan ?= sin ?cos ?and cot ?= cos ? sin ?

For an angle ? in standard position, a reference triangle is a triangle formed by the terminal side of angle ?, the x-axis, and a perpendicular dropped from a point on the terminal side to the x-axis. The angle in a reference triangle at the origin is the reference angle

A matrix in which rows consisting of all 0’s occur only at the bottom of the matrix, the first nonzero entry in any row with nonzero entries is 1, and the leading 1’s move to the right as we move down the rows.

One-half of the sum of the lengths of the sides of a triangle.

5280 feet.

Sn = a111 - r n 2 1 - r

(a + bi) + (c + di) = (a + c) + (b + d)i

If a = b, then b = a

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

The points x, 0, z in Cartesian space.