A proof for sin(a+b) and cos(a+b) that you probably haven’t seen before
22:38
How To Catch A Cheater With Math
13:46
Can you solve Microsoft's bridge and torch riddle?
13:58
a twist on a classic circle problem
6:46
Believe in triangles, not squaring both sides!
14:59
Understand Riemann Sum Vs Definite Integral! (Calculus 1)
16:40
I never understood why you can't go faster than light - until now!
13:55
Imaginary numbers aren't imaginary
13:33