All the TRIG you need for calculus actually explained

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This video is all about trigonometry, focusing on reviewing everything you are likely to actually use regularly in calculus. Instead of having to memorize a million trig identities I want to show how you can understand trig, where the formulas come from, and how you can figure them out on your own if you randomly need one in the middle of a test.

0:00 Trig Intro
0:40 Unit Circle Definitions
2:21 Why Radians
3:30 Pythagoras
4:02 Graphing cos and sin from unit circle
5:31 Special triangles
8:27 Computing Weird Trig Values
9:52 The other Trig Functions
10:49 Graphing Tan etc
13:31 Geometric Meaning of Sec and Tan
12:27 Other Pythagorean Identities
14:36 Trig Identities
16:27 Geometric Proof of Sum Rule
19:34 Brilliant.org/TreforBazett

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