Published: July 16, 2012
Returns the cosine of a complex number in x + yi or x + yj text format.
A variable that represents a WorksheetFunction object.
Inumber - a complex number for which you want the cosine.
Use COMPLEX to convert real and imaginary coefficients into a complex number.
If inumber is a logical value, IMCOS returns the #VALUE! error value.
The cosine of a complex number is: