Returns the hyperbolic cosine of a complex number.
- complex_number - The complex number whose hyperbolic cosine is to be computed.
IMCOSH(COMPLEX(4,1)) returns the hyperbolic cosine of the complex number formed by the COMPLEX function.
IMCOSH(C5) returns the hyperbolic cosine of the complex number contained in C5.
- The IMCOSH function returns an error if the given number is not a valid complex number.
- complex_number can be either the result of the COMPLEX function, or a real number (interpreted as a complex number with imaginary part equal to 0), or a string in the format “x+yi” where x and y are numeric.