IMCOT function /text/scalc/01/func_imcot.xhp
IMCOT function cotangent;complex number

IMCOT function

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

=IMCOT("4-3i")
returns 0.00490118239430447+0.999266927805902i. =IMCOT(2)
returns -0.457657554360286 as a string.
IMCOT wiki page.