From: <noreply@so...>  20021107 16:31:08

Bugs item #635045, was opened at 20021107 10:31 You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=635045&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Barton Willis (willisb) Assigned to: Nobody/Anonymous (nobody) Summary: derivatives of acsc, ... Initial Comment: Maxima's formulae for the derivatives of acsc, asec, acsch, and asech are incorrect in the left half plane. To illustrate, we should have asin(1/x)  acsc(x) = 0 for all x # 0; however, (C2) ratsimp(diff(asin(1/x)  acsc(x),x)); (D2) SQRT(x^21)*(ABS(x)x)/(x^4x^2) This only vanishes for x > 0. I've attached a diff file for comm.lisp that fixes these problems. And I attached an rtest file that tests the derivatives of the inverse trig functions. Barton  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=635045&group_id=4933 