Справка LibreOffice 7.5
Returns the hyperbolic cosine of a complex number. The hyperbolic cosine of a complex number can be expressed by:
МНИМ.COSH(КомплексноеЧисло)
Complex_number is a complex number whose hyperbolic cosine is to be calculated.
=МНИМ.COSH("4-3i")
возвращает -27,0349456030742-3,85115333481178i.
=IMCOSH(2)
returns 3.76219569108363 as a string. The imaginary part is equal to zero, so it is not displayed in the result.