Get better at trig and so much more math at https://brilliant.org/TreforBazett to get started for free for 30 days, and to get 20% off an annual premium subscription!
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.
♡♡♡SUPPORT THE CHANNEL♡♡♡
►Support on PATREON: https://patreon.com/DrTrefor
►MATH BOOKS I LOVE (affiliate link): https://www.amazon.com/shop/treforbazett
►CURIOSITY BOX: https://www.CuriosityBox.com/DrTrefor use CODE drtrefor for 25% off awesome STEM merch boxes
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
COURSE PLAYLISTS:
►DISCRETE MATH: https://www.youtube.com/playlist?list=PLHXZ9OQGMqxersk8fUxiUMSIx0DBqsKZS
►LINEAR ALGEBRA: https://www.youtube.com/playlist?list=PLHXZ9OQGMqxfUl0tcqPNTJsb7R6BqSLo6
►CALCULUS I: https://www.youtube.com/playlist?list=PLHXZ9OQGMqxfT9RMcReZ4WcoVILP4k6-m
►CALCULUS II: https://www.youtube.com/playlist?list=PLHXZ9OQGMqxc4ySKTIW19TLrT91Ik9M4n
►MULTIVARIABLE CALCULUS (Calc III): https://www.youtube.com/playlist?list=PLHXZ9OQGMqxc_CvEy7xBKRQr6I214QJcd
►VECTOR CALCULUS (Calc IV) https://www.youtube.com/playlist?list=PLHXZ9OQGMqxfW0GMqeUE1bLKaYor6kbHa
►DIFFERENTIAL EQUATIONS: https://www.youtube.com/playlist?list=PLHXZ9OQGMqxde-SlgmWlCmNHroIWtujBw
►LAPLACE TRANSFORM: https://www.youtube.com/playlist?list=PLHXZ9OQGMqxcJXnLr08cyNaup4RDsbAl1
►GAME THEORY: https://www.youtube.com/playlist?list=PLHXZ9OQGMqxdzD8KpTHz6_gsw9pPxRFlX
OTHER PLAYLISTS:
►Cool Math Series:
https://www.youtube.com/playlist?list=PLHXZ9OQGMqxelE_9RzwJ-cqfUtaFBpiho
► Learning Math Series
https://www.youtube.com/watch?v=LPH2lqis3D0&list=PLHXZ9OQGMqxfSkRtlL5KPq6JqMNTh_MBw
SOCIALS:
►X/Twitter: http://X.com/treforbazett
►TikTok: http://tiktok.com/@drtrefor
►Instagram (photography based): http://instagram.com/treforphotography