IMCOS function /text/scalc/01/func_imcos.xhp
IMCOS function cosine;complex number

IMCOS function

Returns the cosine of a complex number. The cosine of a complex number can be expressed by:
IMCOS equation IMCOS(Complex_number) Complex_number is a complex number whose cosine is to be calculated.

=IMCOS("4-3i")
returns -6.58066304055116-7.58155274274654i. =IMCOS(2)
returns -0.416146836547142 as a string.
IMCOS wiki page. , ,