It's the pattern sqrt(f(x)) with f containing trigonometric functions. Use giac for such integrals.
sage: integral(abs(sin(pi*x)), x, 0, 1, algorithm='giac') 2/pi There is no meta ticket for this, you can find integration tickets at https://trac.sagemath.org/wiki/symbolics#Integrationtickets It's not difficult to implement a heuristic to use giac, but we need a review of https://trac.sagemath.org/ticket/24283 Regards, -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.