20 Questions on Edexcel C3 Maths: Trigonometry - Everything You Always Wanted To Know About Sec(x) But Were Too Afraid To Ask (Why Didn't They Teach It Like That In Class?)

With trigonometry, it's easy to end up going around in circles. This ebook addresses the 20 biggest questions about the trig elements of EdExcel's Core 3 maths module -- so you can get on top of sin, cos, tan and the rest of it and pick up all of the marks available.

Written by Colin Beveridge, author of several Maths For Dummies books and a number of A-level maths guides, this book shows you how to:

* work out exact answers to sin, cos and tan questions in degrees and radians
* work with the minor functions (sec, cosec and cot) and the inverse functions
* use the compound-angle and double-angle formulas, and solve the R sin (x+a) type of questions
* differentiate all of the functions you need to know about
* work through trig proofs
* sketch graphs

... and much more.