[Octave-bug-tracker] [bug #43349] asin behaves differently from Matlab for arguments larger than 1

[Ricardo Biloti]

URL:
  <http://savannah.gnu.org/bugs/?43349>

                 Summary: asin behaves differently from Matlab for arguments
larger than 1
                 Project: GNU Octave
            Submitted by: biloti
            Submitted on: Qui 02 Out 2014 11:31:48 BRT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: Ricardo Biloti
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.8.1
        Operating System: GNU/Linux

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Details:

Let x be a real value greater than 1 (x > 1). Then Matlab reports that

asin (x) = pi/2 - a*i, for some a > 0

However Octave produces the complex conjugate

asin (x) = pi/2 + a*i

This occurs only for real x > 1. Both Matlab and Octave agree for real x <=1.




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