Why are sin, cos and tan called sin, cos and tan?
9:15
Where do Sin, Cos and Tan Actually Come From - Origins of Trigonometry - Part 1
32:35
Trigonometry Concepts - Don't Memorize! Visualize!
4:15
Trig Visualized: One Diagram to Rule them All (six trig functions in one diagram)
8:19
All 6 Trig Functions on the Unit Circle
20:51
All the TRIG you need for calculus actually explained
31:00
U3L2 - Sine, Cosine, and Tangent: Radians
11:08
Sinus et cosinus : définition, courbes, et exemple d'application
3:44