ACOSH(number)

Returns the hyperbolic arc-cosine of a number.

 number The number you want the inverse hyperbolic cosine of.

Remarks

* The hyperbolic arc-cosine of a number is the inverse of the COSH function.
* This function is also called the inverse hyperbolic cosine function.
* The "number" is the angle in radians.
* If "number" < 1, then #NUM! is returned.
* If "number" is not numeric, then #VALUE! is returned.
* You can use the COSH function to return the hyperbolic cosine.
* You can use the ASINH function to return the hyperbolic arc-sine.
* You can use the ATANH function to return the hyperbolic arc-tangent.
* For a working example refer to the Hyperbolic Functions page.
* For the Microsoft documentation refer to support.office.com

 A 1 =ACOSH(1) = 0 2 =ACOSH(COSH(1)) = 1 3 =ACOSH(COSH(10)) = 10 4 =ACOSH(45) = 4.5 5 =ACOSH(ACOS(0.5)) = 0.306 6 =ACOSH(COSH(355)) = 355 7 =ACOSH(COSH(356)) = #NUM! 8 =ACOSH(COSH(500)) = #NUM! 9 =ACOSH(-1) = #NUM! 10 =ACOSH("some text") = #VALUE!

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