# ACOSH

ACOSH(number)

Returns the hyperbolic arc-cosine of a number.

 number The number you want the inverse hyperbolic cosine of.

 REMARKS
 * 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 a working example refer to the Quant > Hyperbolic Functions page.* For the Microsoft documentation refer to support.microsoft.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.