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man pages->NetBSD man pages -> tanhf (3)
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## TANH(3)

```
```

### NAME[Toc][Back]

```     tanh, tanhf - hyperbolic tangent function
```

### LIBRARY[Toc][Back]

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

### SYNOPSIS[Toc][Back]

```     #include <math.h>

double
tanh(double x);

float
tanhf(float x);
```

### DESCRIPTION[Toc][Back]

```     The tanh() and tanhf() functions compute the hyperbolic tangent of x.
For a discussion of error due to roundoff, see math(3).
```

### RETURN VALUES[Toc][Back]

```     The tanh() function returns the hyperbolic tangent value.
```

```     acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3),
sinh(3), tan(3)
```

### STANDARDS[Toc][Back]

```     The tanh() function conforms to ANSI X3.159-1989 (``ANSI C'').

BSD                               May 2, 1991                              BSD
```
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