3 INSANE integrals solved using Feynman's technique and the polygamma functions

To try everything Brilliant has to offer—free—for a full 30 days, visit http://brilliant.org/Maths505/ and the first 200 of you will get 20% off Brilliant’s annual premium subscription. Brilliant's article on the digamma functions: https://brilliant.org/wiki/digamma-function/#:~:text=The%20digamma%20function%20usually%20denoted,derivative%20of%20the%20gamma%20function. This video is definitely my favourite log-trig integral video so far The video about the derivatives of the gamma function: https://youtu.be/lNTpB5OvsHY Also, if you like the channel and would like to support me making content, you can do so via Patreon (see the about section of the channel).