asinh, asinhf : inverse hyperbolic sine

Synopsis

#include <math.h>
double asinh(double x);
float asinhf(float x);
```### Description

asinh calculates the inverse hyperbolic sine of x. asinh is defined as asinhf is identical, other than taking and returning floats.### Returns

asinh and asinhf return the calculated value.

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**Authoritative source**: BUSMASTER DITA help source `asinh.dita`, compiled into `BUSMASTER.CHM` with the application.