[Octave-bug-tracker] [bug #62048] acos and cos are giving different answers

[Torsten Lilge]

Update of bug #62048 (project octave):

                  Status:                    None => Invalid                
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #1:

I think, you can not expect that both loops converge to the equilibrium xe =
0.7391. Since |cos(xe)'| < 1 and |acos(xe)'| > 1, the loop with cos()
converges and the loop with acos() diverges. You can observe the same for x =
x^2 and x = sqrt(x) when starting at x near to the equilibrium xe = 1.

Closing this report as invalid.



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