[Octave-bug-tracker] [bug #62332] [MinGW] acos(z), asin(z) and atan(z) , ( z = x + yi ) return wrong result for imaginary part lower than 1e-12

[anônimo]

Follow-up Comment #2, bug #62332 (project octave):

Yes Rik, this summarizes the problem perfectly.

[comment #1 comentário #1:]
> Is the summary that the C++ math library on MinGW is inaccurate?
> 
> It seems that a test for the behavior can be boiled down to
> 
> 
> imag (acos (complex (cosd (45), 1e-18)))
> 
> 
> This should return -1.4e-18, but returns 0 on MinGW.  Is that correct?


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