ACOSH Returns the inverse hyperbolic cosine of a number. The 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.
Syntax
ACOSH(number)
Parameters
Number – Any real number equal to or greater than 1.
Return Value
Returns the inverse hyperbolic cosine of a number.
Reference Data
https://docs.microsoft.com/en-us/dax/dax-function-reference