## [Maxima-bugs] [ maxima-Bugs-2977332 ] x*cos(x/2)

 [Maxima-bugs] [ maxima-Bugs-2977332 ] x*cos(x/2) From: SourceForge.net - 2010-03-26 23:35:51 ```Bugs item #2977332, was opened at 2010-03-26 23:34 Message generated for change (Settings changed) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977332&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core - Integration Group: None >Status: Deleted Resolution: None Priority: 5 Private: No Submitted By: https://me.yahoo.com/a/eusus3Ud () Assigned to: Nobody/Anonymous (nobody) Summary: x*cos(x/2) Initial Comment: integrate(x*(cos(x/2)),x) and f(n):=expand(integrate(x*(n+cos(x/2)),x)-integrate(n*x,x)); are same function but... When n are even numbers, results are always 1/2 (%i2) f(1); (%o2) 2*x*sin(x/2)+4*cos(x/2) (%i3) f(2); (%o3) x*sin(x/2)+2*cos(x/2) (%i4) f(3);(%o4) 2*x*sin(x/2)+4*cos(x/2) (%i5) f(4); ***** if f(n) is defined as f(n):=expand(integrate(x*n+x*cos(x/2),x)-integrate(n*x,x)) f(n) gives always correct answer. (%o5) x*sin(x/2)+2*cos(x/2) ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977332&group_id=4933 ```

 [Maxima-bugs] [ maxima-Bugs-2977307 ] x*cos(x/2) From: SourceForge.net - 2010-03-26 22:35:05 ```Bugs item #2977307, was opened at 2010-03-26 22:35 Message generated for change (Tracker Item Submitted) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977307&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core - Integration Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: https://me.yahoo.com/a/eusus3Ud () Assigned to: Nobody/Anonymous (nobody) Summary: x*cos(x/2) Initial Comment: integrate(x*(cos(x/2)),x) and f(n):=expand(integrate(x*(n+cos(x/2)),x)-integrate(n*x,x)); are same function but... When n are even numbers, results are always 1/2 (%i2) f(1); (%o2) 2*x*sin(x/2)+4*cos(x/2) (%i3) f(2); (%o3) x*sin(x/2)+2*cos(x/2) (%i4) f(3);(%o4) 2*x*sin(x/2)+4*cos(x/2) (%i5) f(4); ***** if f(n) is defined as f(n):=expand(integrate(x*n+x*cos(x/2),x)-integrate(n*x,x)) f(n) gives always correct answer. (%o5) x*sin(x/2)+2*cos(x/2) ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977307&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-2977332 ] x*cos(x/2) From: SourceForge.net - 2010-03-26 23:34:57 ```Bugs item #2977332, was opened at 2010-03-26 23:34 Message generated for change (Tracker Item Submitted) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977332&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core - Integration Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: https://me.yahoo.com/a/eusus3Ud () Assigned to: Nobody/Anonymous (nobody) Summary: x*cos(x/2) Initial Comment: integrate(x*(cos(x/2)),x) and f(n):=expand(integrate(x*(n+cos(x/2)),x)-integrate(n*x,x)); are same function but... When n are even numbers, results are always 1/2 (%i2) f(1); (%o2) 2*x*sin(x/2)+4*cos(x/2) (%i3) f(2); (%o3) x*sin(x/2)+2*cos(x/2) (%i4) f(3);(%o4) 2*x*sin(x/2)+4*cos(x/2) (%i5) f(4); ***** if f(n) is defined as f(n):=expand(integrate(x*n+x*cos(x/2),x)-integrate(n*x,x)) f(n) gives always correct answer. (%o5) x*sin(x/2)+2*cos(x/2) ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977332&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-2977332 ] x*cos(x/2) From: SourceForge.net - 2010-03-26 23:35:51 ```Bugs item #2977332, was opened at 2010-03-26 23:34 Message generated for change (Settings changed) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977332&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core - Integration Group: None >Status: Deleted Resolution: None Priority: 5 Private: No Submitted By: https://me.yahoo.com/a/eusus3Ud () Assigned to: Nobody/Anonymous (nobody) Summary: x*cos(x/2) Initial Comment: integrate(x*(cos(x/2)),x) and f(n):=expand(integrate(x*(n+cos(x/2)),x)-integrate(n*x,x)); are same function but... When n are even numbers, results are always 1/2 (%i2) f(1); (%o2) 2*x*sin(x/2)+4*cos(x/2) (%i3) f(2); (%o3) x*sin(x/2)+2*cos(x/2) (%i4) f(3);(%o4) 2*x*sin(x/2)+4*cos(x/2) (%i5) f(4); ***** if f(n) is defined as f(n):=expand(integrate(x*n+x*cos(x/2),x)-integrate(n*x,x)) f(n) gives always correct answer. (%o5) x*sin(x/2)+2*cos(x/2) ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977332&group_id=4933 ```
 [Maxima-bugs] [ maxima-Bugs-2977307 ] x*cos(x/2) From: SourceForge.net - 2010-03-26 23:40:25 ```Bugs item #2977307, was opened at 2010-03-26 22:35 Message generated for change (Settings changed) made by You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977307&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core - Integration Group: None >Status: Deleted Resolution: None Priority: 5 Private: No Submitted By: https://me.yahoo.com/a/eusus3Ud () Assigned to: Nobody/Anonymous (nobody) Summary: x*cos(x/2) Initial Comment: integrate(x*(cos(x/2)),x) and f(n):=expand(integrate(x*(n+cos(x/2)),x)-integrate(n*x,x)); are same function but... When n are even numbers, results are always 1/2 (%i2) f(1); (%o2) 2*x*sin(x/2)+4*cos(x/2) (%i3) f(2); (%o3) x*sin(x/2)+2*cos(x/2) (%i4) f(3);(%o4) 2*x*sin(x/2)+4*cos(x/2) (%i5) f(4); ***** if f(n) is defined as f(n):=expand(integrate(x*n+x*cos(x/2),x)-integrate(n*x,x)) f(n) gives always correct answer. (%o5) x*sin(x/2)+2*cos(x/2) ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2977307&group_id=4933 ```