It took me 3 hours to do this integral!
10:12
Trig sub, then sub trig
11:59
We must do this do this carefully!
17:53
Supreme Integral with Feynman's Trick
8:21
Differentiation under the Integral Sign Tutorial
7:52
Integral of ln(x) with Feynman's trick!
18:05
But HOW did Euler do it?! A BEAUTIFUL Solution to the FAMOUS Basel Problem!
22:44
integral of sin(x)/x from 0 to inf by Feynman's Technique
12:19