Olá,usando integral por partes:int (arctg(x)) = x.arctg(x) - int (x/(1+x^2)) + cint (arctg(x)) = x.arctg(x) - ln(1+x^2) / 2 + cabraços,Salhab----- Original Message -----From: Luiz MilettoSent: Sunday, April 30, 2006 11:36 PMSubject: [obm-l] IntegralDemonstrar a integral de arco tangente de u(x):