Returns the cotangent of a complex number.
Syntax
IMCOT( z )
where z is a complex number
Semantics
IMCOT( z ) is equivalent to IMDIV(IMCOS(z), IMSIN(z)).
To get better accuracy it is not implemented that way. With the notation IMCOT("a+bj")="c+dj" the used formulas are
real part
imaginary part