COSH()
Syntax. COSH(number)
Definition. This function returns the hyperbolic cosine of a number.
Argument
number (required) Any real number.
Background. The hyperbolic cosine belongs to the hyperbolic functions, which are (like the circle functions) defined for all real and complex numbers. (However, Excel allows only real arguments, not complex arguments, for hyperbolic functions.) The hyperbolic cosine is defined as follows:
A hyperbolic cosine is shown in Figure 16-13.
Figure 16-13. The hyperbolic cosine is an even function symmetrical to the y-axis ...
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