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# atanh

From cppreference.com
< c‎ | numeric‎ | math

Defined in header `<math.h>` |  |
float atanhf( float arg ); |  | (since C99)
double atanh( double arg ); |  | (since C99)
long double atanhl( long double arg ); |  | (since C99)

Computes area hyperbolic tangent of `arg`

### [edit] Parameters

arg | - | floating point value

### [edit] Return value

Inverse hyperbolic tangent of `arg`

### [edit] See also

asinh (C99) | area hyperbolic sine (function) [edit]
acosh (C99) | area hyperbolic cosine (function) [edit]
tanh | hyperbolic tangent (function) [edit]
C++ documentation for atanh

### [edit] External links

Weisstein, Eric W. "Inverse Hyperbolic Tangent." From MathWorld--A Wolfram Web Resource.

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