A Beautiful Use of Differentiation Under the Integral Sign

Mis-4719 Integrate arctan(sqrt(2) tan x)/(tan x)dx from 0 to π/2 #calculus #definite_integrals #leibniz #integral #rule #substitution #cipher Jalandhar by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/...