Trigonometry: Intuition, Definitions and a Tiny Bit of Coding
Channel: Hsing Liu
Date: 2014-05-15

Coursera -- An Introduction to Interactive Programming in Python

I'm wearing my only tie.

Week 7 -- Since there's a brief mention of trigonometry in the lectures, I'm going full-geek mode and talk math.

For a full treatment of trigs, I recommend Khan Academy.
http://www.khanacademy.org

(For viewers not coming from the IIPP class, this video was made as a student tutorial to accompany the materials for that particular week of the computer science online course.)