Исходное сообщение
"Релиз системы для математических расчётов GNU Octave 4.0.0" Отправлено ячс, 01-Июн-15 01:58
> Вывод функций sin и cos зависит от rounding mode cpu ** The trigonometric functions asin and acos return different phase values     from previous versions of Octave when the input is outside the principal     branch ([-1, 1]).  If the real portion of the input is greater than 1 then     the limit from below is taken.  If the real portion is less than 1 then the     limit from above is taken.  This criteria is consistent with several other     numerical analysis software packages. ** The hyperbolic function acosh now returns values with a phase in the range     [-pi/2, +pi/2].  Previously Octave returned values in the range [0, pi].     This is consistent with several other numerical analysis software packages.