ACOSH

**Syntax:** **ACOSH( X)**

*X* = a numeric value greater than or equal to 1.

**ACOSH** returns the hyperbolic arc cosine of angle *X*. The
result is the angle (in radians) whose hyperbolic cosine
is *X*.

**Examples:**

**ACOSH**(5) = 2.2924317

**ACOSH**(F5) = 5.192926, where F5 = 90

**ACOSH**(-1) = Error - **ACOSH**, domain is x = 1

**Excel function:** ACOSH

Grey Trout Software

02 March 2003