25:21
An interesting trigonometry problem -- featuring roots of unity.
Michael Penn
30:56
A classic trig identity! Featuring Chebyshev polynomials.
11:58
The trig functions you have never heard of!!
18:18
A famous trig equation.
9:42
a golden value of cosine.
11:38
A nice complex trigonometric identity.
10:28
a complex approach to a basic identity.
12:37
the craziest trig simplification I have ever seen!!
12:01
Lagrange's trigonometric identity.
13:08
only SPECIAL INTEGERS make this TRUE
