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

```
```

### NAME[Toc][Back]

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

### LIBRARY[Toc][Back]

```     Math Library (libm, -lm)
```

### SYNOPSIS[Toc][Back]

```     #include <math.h>

double
asinh(double x);

float
asinhf(float x);
```

### DESCRIPTION[Toc][Back]

```     The asinh() and the asinhf() functions compute the inverse hyperbolic
sine of the real argument x.  For a discussion of error due to roundoff,
see math(3).
```

### RETURN VALUES[Toc][Back]

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

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

### HISTORY[Toc][Back]

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

FreeBSD 5.2.1			  May 6, 1991			 FreeBSD 5.2.1```
[ Back ]
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