Trigonometry: Engineering Mathematics Notes

A clear review of the essential topics: angle measurement, the unit circle, trigonometric functions, graphs, identities and triangle solving. Each topic comes with practice problems and full solutions, perfect before an exam.

Governors State University

A short, friendly introduction that starts with right triangles and solving triangles, then moves on to graphs, identities, equations and the laws of sines and cosines. Ideal for a first course or a quick refresher.

Richard W. Beveridge

A classic school textbook that introduces trigonometry step by step, from measuring angles to ratios, identities, logarithms and solving triangles. Its many worked examples and exercises make it a great first book.

J. B. Lock

A practical guide to right triangle trigonometry, covering Pythagoras' theorem, sine, cosine and tangent, angles of elevation and depression, and bearings. Real-world problems with answers help you build confidence fast.

Southern Cross University

A brief introduction to the basics: degrees and radians, the unit circle, the six trigonometric functions and the double-angle formula. A quick read to review the essentials before a calculus course.

P. Maidorn