Trigonometric Functions: Sine, Cosine, Tangent, Cosecant, Secant, and Cotangent

Oh man, what is all this sine and cosine business? What do these things even mean?! And Greek letters now? I don't know Greek! OK friend, just relax. Understanding the trig functions is as easy as pi radians. We just make some triangles and set up a few definitions. I promise it's no sweat, just watch this!

Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!

[ProfessorDaveExplains]

Yikes, it looks like I accidentally used numbers for the side lengths in the checking comprehension that don't abide by the Pythagorean Theorem! How embarrassing. Luckily it doesn't really change what you're doing, but my apologies for this ridiculous error anyway.

[hassannur]

when I mostly needed it
thanks Jesus

[jimjohnston]

I really love the approach you take to working with these concepts. I have been running away from any form of math for over 50 years, but, now, thanks to your vids, things are making sense, and I am really enjoying spending time taking notes and solving problems.

[allansayed]

I am going down a rabbit hole; I started from cellular membrane potentials to electricity to electron fields to the electrodynamics to the quantum mechanical definition of energy to chemical bond energy to atomic orbitals to Schrodinger's equation to trigonometry. The moment I heard "SOHCAHTOA" brought back a flash of highschool physics classes. I wish i paid attention in highschool.

[HellooDae]

I took a look at your channel, and I have lots of respect for you. Multiple playlists about different subjects, and all of such high quality. I watch this videos everyday, because I dream to just be good at math, and there is already a lot of improvement. I have been watching since December, it is March now. Thank you, from the bottom of my heart.

[Wintersghost]

When I was in college, I used to joke that I’d name my daughter SOHCAHTOA and my son IUPAC. You’re a chem guy so you’ll get that. Yeah, I love it that much.

[jagruti_rs]

Prof owe you!!

No other like you or somewhat near to be like you.. have ever came up! ❤️

[هایدهنرماشیری]

My sincere gratitude to you, professor Dave.❤

[georgesadler]

Professor Dave, thank you for a short and outstanding video on Trigonometric Functions. These classical Trig functions are the heart and soul of Trigonometry.

[DevDevi]

Wow, this was some seriously good explaining.

[yarawaleedesmail]

Thank you so much professor, really that helped me alot

[rubenb]

The title Prof. and the into were enough for me to sub hahaha.
(I'm a C programmer btw, but my terrible past in school made me have to go back to this stuff haha. Life's weird.)

[MiltosPol-qnzh]

I was waiting for these certain tutorials for four months!!!!

[defacube]

I didn't think I would learn 6 trigonometric functions from a 7 minute youtube video. This was really helpful

[AnamshaAnsariAnamshaAnsari]

Your explanation is truely excellent... It clear so much concept of my Trigonometry..

[eeliot]

God, I hate trigonometry. This was helpful though

[lelouchvibritanniacommands]

Thank you very much! Finally, I understand something after one semester of no understanding

[drproton]

Thank you, thank you, thank you, thank you, THANK YOU!

Jeez been stuck on college precal on this. I'm like, "WTF IS SINE!"

The book we were provided didn't have the SOHCAHTOA abbreviation. That's so awesome!

[RandomGoldieStuff]

You sir are single handedly saving my butt this semester

[legendrams]

Subscribed, very good graphics and explanation 👍