A trigonometry introduction, overview and review including trig functions, cartesian quadrants, angle measurement in degrees and radians, the Unit Circle and the Pythagorean Theorem.
2026 update: This was my first video and I thought I could do a better job now, so here is a "better" version: https://youtu.be/y4MiAOm5quk
Also: I have posted a longer multi-part trig series! Please see the Introductory video here: https://youtu.be/U23JMdBIJ0M
The playlist is here: https://www.youtube.com/playlist?list=PLhSQQGbiWoTChZSbP-XcXH40IT7vfyyFk
Timestamps for this video:
00:00 Introduction
00:36 1. The Six Trigonometric Functions
09:35 2. Cartesian Coordinates and Quadrants
11:24 3. Angle Measurement in Degrees and Radians
19:34 4. The Pythagorean Theorem
20:44 5. The Unit Circle
International A level, Intl A Level, IAL, Edexcel, Pearson exam board, CIE, Cambridge exam board, P3, P2, Year 10, Class 11
