A beautiful result in calculus: Solution using Feynman integration ( Integral cos(x)/(x^2+1) )

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Leibniz integral rule: The Leibniz rule for integrals: The D...
Dirichlet 1: Doing double Feynman Integration on t...
Dirichlet 2: DESTROYING THE DIRICHLET INTEGRAL (si...
Dirichlet 3: A COMPLEX BOI! Integral sin(e^x) from...

Haha :D Quite some tounge slipperinos in this video XD Especially in the end, it's meant to be ,,Patreon" not,,video" :D
Nvm, I hope you guys are enjoying this great technique of solving this integral using feynman integration :) Turning an integral into a second order ordinary homogeneous differential equation is such a nice way of aproaching a problem!!! :)

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