trigonometry like you've never seen it
23:03
the parabolic trig functions
15:43
what function satisfies these conditions??
13:25
Impossible Squares - Numberphile
25:06
What is the i really doing in Schrödinger's equation?
18:49
Comment mentir en utilisant des preuves visuelles
19:32
Some geometry behind the Basel problem
15:19
What does the second derivative actually do in math and physics?
32:21