Douglas Downing

"This new edition in Barron's Easy Way Series contains everything students need to prepare for an algebra class. Algebra: The Easy Way provides key content review and practice exercises to help students learn algebra the easy way. Topics covered in this detailed review of algebra include general rules for dealing with numbers, equations, negative numbers and integers, fractions and rational numbers, exponents, roots and real numbers, algebraic expressions,...

Explains the principles of trigonometry and includes practice exercises with answers.

From the Publisher: This self-instruction book explains angles and triangles, and demonstrates the solutions to right triangle problems. Chapters that follow deal with trigonometric functions of sine, cosine, and tangent, radian measures, Pythagorean and other trigonometric identities, graphs of trigonometric functions, waves, polar coordinates, complex numbers, conic sections, spherical trigonometry, polynomial approximation for sin x and cos x,...

This updated title in Barron's Business Review series shows how to apply statistical methods to a variety of business situations in order to produce enlightening and profitable information. Topics covered include probability and hypothesis testing, random variables, polls and sampling, multiple linear regression, analyzing business data, decision theory, and more. Business Review books are designed for classroom use, but are also valuable as self-teaching...