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Trig Review

If you have The Mathematics Companion, this relevant material is in sections 1.1.6, and 1.6. The material is covered more comprehensively there then in the videos below at present.

Here is a selection of videos mostly from Kahn Academy that are most appropriate for reviewing key concepts in trigonometry applicable to physics:

The basics: cos, sin and tan. (intro)

The basics: examples

What are radians and why?

Sin and Cos relations

What are hyperbolic functions and why?


Need to add double-angle,  various addition rules and more on hyperbolic functions.