The ACOSH function returns the inverse hyperbolic cosine of a number. Number must be greater than or equal to 1. The inverse hyperbolic cosine is the value whose hyperbolic cosine is number, so ACOSH(COSH(number)) equals number.

ACOSH takes 1 required argument and no optional arguments:

Syntax: ACOSH(number)

#1)
Using the ACOSH function:
#2)
The arguments for the ACOSH function are:
Argument Required? Description
number Required Any real number equal to or greater than 1.

Summary

The ACOSH function returns the inverse hyperbolic cosine of a number. Number must be greater than or equal to 1. The inverse hyperbolic cosine is the value whose hyperbolic cosine is number, so ACOSH(COSH(number)) equals number.
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