[Libreoffice-bugs] [Bug 126734] New: Function atan2 has its arguments reversed.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=126734

            Bug ID: 126734
           Summary: Function atan2 has its arguments reversed.
           Product: LibreOffice
           Version: 6.2.5.2 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: photius829 at yahoo.com

Description:
atan2(y,x) should return the same as atan(y/x) for x > 0.
Instead, it returns atan(x/y).
See https://en.wikipedia.org/wiki/Atan2 under "Definition and computation."

Steps to Reproduce:
1. Enter =atan2(1,2) in a cell.
2. Enter =atan(0.5) in another cell.
3. Enter =atan(2) in another cell.


Actual Results:
atan2(1,2) returns 1.10714871779409.
atan(0.5) returns 0.463647609000806.
atan(2) returns 1.10714871779409.




Expected Results:
atan2(1,2) returns 0.463647609000806.
atan(0.5) returns 0.463647609000806.
atan(2) returns 1.10714871779409.



Reproducible: Always


User Profile Reset: No



Additional Info:
[Information automatically included from LibreOffice]
Locale: en-US
Module: SpreadsheetDocument
[Information guessed from browser]
OS: Windows (All)
OS is 64bit: no

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