Returns the cosine of a complex number. The cosine of a complex number can be expressed by:
cos(a+bi) = cos(a)cosh(b) - sin(a)sinh(b)i
The result is presented in the string format and has the character "i" or "j" as an imaginary unit.
The function always returns a string representing a complex number. If the result is a complex number with one of its parts (a or b) equal to zero, that part is not displayed.
Complex_number is a complex number whose cosine is to be calculated.
A complex number is a string expression resulting in the form "a+bi" or "a+bj", where a and b are numbers. If the complex number is actually a real number (b=0), then it can be either a string expression or a number value.
=IMCOS("4-3i") returns -6.58066304055116-7.58155274274654i.
=IMCOS(2) returns -0.416146836547142 as a string. The imaginary part is equal to zero, so it is not displayed in the result.
Related LibreOffice functions:
This function is part of the Open Document Format for Office Applications (OpenDocument) standard Version 1.2. (ISO/IEC 26300:2-2015)