View Single Post
Dick is online now
Jan17-10, 12:20 PM
Sci Advisor
HW Helper
P: 25,170
I really don't know how you are trying to do the problem. l'Hopital's rule doesn't tell you to integrate anything. Write it as ln(x)/cot(pi*x/2). Now it's a 0/0 form. Now differentiate numerator and denominator like l'Hopital says.