Returns the hyperbolic arc-sine of a number.

numberThe number you want the inverse hyperbolic sine of.

* The hyperbolic arc-sine of a number is the inverse of the SINH function.
* This function is also called the inverse hyperbolic sine function.
* The "number" is the angle in radians.
* If "number" is not numeric, then #VALUE! is returned.
* You can use the ACOSH function to return the hyperbolic arc-cosine.
* You can use the ATANH function to return the hyperbolic arc-tangent.
* You can use the SINH function to return the hyperbolic sine.
* In Excel 2010 the accuracy of this function was improved.
* For a working example refer to the Hyperbolic Functions page.
* For the Microsoft documentation refer to

1=ASINH(-2.5) = -1.647
2=ASINH(10) = 2.998
3=ASINH(-1) = -0.881
4=ASINH(1) = 0.881
5=ASINH(SINH(0.5)) = 0.5
6=ASINH(-500) = -6.908
7=ASINH("some text") = #VALUE!

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