ACOSH

ACOSH(number)

Returns the hyperbolic arc-cosine of a number.

number

The number you want the inverse hyperbolic cosine of.

REMARKS

* For an illustrated example refer to the Hyperbolic Functions page.
* The inverse of this function is 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 the Microsoft documentation refer to support.microsoft.com
* For the Google documentation refer to support.google.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!

1 - What is the inverse hyperbolic cosine of 1 radian.
2 - This function is the inverse of the hyperbolic cosine function.
3 - This function is the inverse of the hyperbolic cosine function.
4 - What is the inverse hyperbolic cosine of 4.5.