This Companion is an ideal source of reference for students in a variety of subjects, including mathematics. It contains all the essential reference information required during AS and A level courses in mathematics and statistics, as well as many Higher Education and vocational courses, in a single handy volume.The book contains a large number of formulae, explanations of the meanings of terms, statistical tables and other useful information. There is a clear contents list and index, and the information is coded according to level and area of mathematics, making it very easy to find the information you need.Students will use this handy reference book throughout their post 16 studies and beyond.