Cosine, sine and tangent of π/6 and π/3

With the unit circle and the Pythagorean theorem, we can find the exact sine, cosine, and tangent of the angles π/6 and π/3.

[masondicroce]

Amazing video, the unit circle really began to click for me after this video!

[joshuawhitman]

My precalc professor never covered this step. Just had us memorize the unit circle and never explained how to derive it. This video would have saved me so much time!

[anonymousmafia]

I needed this. Got recommended at the exact time.

[mikanikz]

I have already watched and studied those video lessons you made, its around 30+, for the entire past February. I’m very thankful that it was worth studying with and now, I can make my fidget spinner!🔥❤️💜

[ch_]

thank you for the video. i have been interested in geometry related to pi/6 since i learned a fascinating fact: pi/6 in meters is exactly the length of a royal cubit as measured at the great pyramid of giza. coincidence? idk, but, it is true. thanks again for all you do to further education. edited for my horrible grammar.

[rodrigosetubal]

Which programs is Khan Academy using now to produce those videos?

[yyoloanonn]

I hope you can start inverse functions and their graphs in the future (like inverse sin (1/2) or inverse arc tangent of (0))

[RaffaelloLorenzusSayde]

I always mess up with tan pie/6 and tan pie/3 for the special triangle lengths. This helps visually so thank you 🙏

[wadchat]

What is the App you’re using here? And how do draw that circle and insert to the work area? Method please!!!

[kaidenjaime]

What app do you guys use? Or is it on the Khan Academy

[vinodkumartaggi]

( Cos π/3, Sin π/3 ) ...why the point on unit circle is defined as this point ...anyone explain

[jonweber]

You should turn on the comments for the April 26th "Pronoun" video.

[賢者タイム-ll]

What kind of explanation is this?
You just randomly construct a triangle with hypotenuse = 1 without explaining why and then assume people will understand what you're saying?