Up a level : Integrals Previous page : The integral of sin(x)/x dx from -infinity to infinity Next page : The integral of e^(-x^2) from –infinity to infinityThis integral was introduced to me by one of my students. It is from some hard maths contest – I could guess from William Lowell Putnam Mathematical Competition. … Continue reading The integral of ln(x+1)/(x^2+1) dx from 0 to 1