# Solve this: integrate 1/((x-1) sqrt(x^2-2x+5))

1. Oct 6, 2011

### worstcalcbook

http://www.wolframalpha.com/input/?i=integrate+1%2F%28%28x-1%29+sqrt%28x^2-2x%2B5%29%29

I have this problem, but there's no solution for it although it's definitively the hardest (people who lack common sense shouldn't write manuals). So, I decided to use wolfram, but it doesn't really help. I don't know how to substitute back s = arctan (u/2) without getting blood on my hands and have no idea where that u = 2 tan x substitution comes from because it wasn't covered in the book. There's only a substitution that's similar (u = tan (x/2)), but I digress.

2. Oct 6, 2011

### worstcalcbook

Nevermind, solved it. Wolfram Alpha is useless most of the time.