Hello With maxima 5.6, the following command : integrate(1/cos(x)^2,x,0,%PI/4); give the answer : lim(x->0) tan(x+%PI/4) I would expect that maxima returns the real 1, because it is a very classical function to integrate. Best regards **************************** Michel Gosse michel.gosse@ac-poitiers.fr michel.gosse@freesbee.fr ****************************