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man pages->OpenBSD man pages -> asinh (3)
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## ASINH(3)

```
```

### NAME[Toc][Back]

```     asinh, asinhf - inverse hyperbolic sine functions
```

### SYNOPSIS[Toc][Back]

```     #include <math.h>

double
asinh(double x);

float
asinhf(float x);
```

### DESCRIPTION[Toc][Back]

```     The asinh() function computes the inverse hyperbolic sine of
the real argument.
The asinhf() function is a single precision version
of asinh().
```

### RETURN VALUES[Toc][Back]

```     The asinh() and asinhf() functions return the inverse hyperbolic sine of
x.
```

```     acosh(3), atanh(3), exp(3), infnan(3), math(3)
```

### HISTORY[Toc][Back]

```     The asinh() function appeared in 4.3BSD.

OpenBSD      3.6                            May      6,      1991
```
[ Back ]
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