Text and ancillary resources under CC-BY-4.0 international license (Attribute, Share and Adapt).

A MOOC free online course on Canvas, offered under a Creative commons CC-BY licence offered by Colorado Community College for students seeking to refresh their pre-college level algebra skills.

To understand electrical theory, it is important to have a grasp of trigonometry. Whether we are talking about single phase or polyphase power, trigonometry is a key concept. This textbook, divided into three sections and provides easy-to-understand and enjoyable lessons on trigonometry, vectors, and AC generation for those training and working as electricians.

MathWorks is the leading developer of mathematical computing software for engineers and scientists.

10 self paced lessons on MATLAB from the University of NSW, Sydney.