bugAxiom Computer Algebra System - Bugs: bug #10067, atan(tan(3)) => 3


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bug #10067: atan(tan(3)) => 3

Submitted by:  None
Submitted on:  Thu 19 Aug 2004 05:41:11 PM UTC  
Category:  algebra Severity:  3 - Normal
Item Group:  code bug Status:  Wont Fix
Privacy:  Public Assigned to:  None
Originator Name:  Originator Email:  -email is unavailable-
Open/Closed:  Closed Release: 
Reproducibility:  None Fixed Release:  November 2008
Error message: 
Example of code trigerring the bug: 


Internal cause: 

In Elemntry.spad, function iatan:

is?(x, optan) => y

Thu 31 Mar 2005 06:51:33 PM UTC, comment #1: 

Transferred to page.axiom-developer.org

Thu 19 Aug 2004 05:41:11 PM UTC, original submission:  

In Elemntry, atan(tan(3)) returns 3.
The error is in iatan:

is?(x, optan) => y

but only if -pi/2 < y < pi/2




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Depends on the following items: None found

Items that depend on this one: None found


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  • -email is unavailable- added by axiom (Updated the item)

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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2008-11-25 axiom Statustransferred => Wont Fix
        Open/ClosedOpen => Closed
        Fixed Release => November 2008
    2005-03-31 billpage1 StatusNone => transferred

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