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# std::acosh

From cppreference.com
< cpp‎ | numeric‎ | math

Defined in header `<cmath>` |  |
float acosh( float arg ); |  | (since C++11)
double acosh( double arg ); |  | (since C++11)
long double acosh( long double arg ); |  | (since C++11)
double acosh( Integral arg ); |  | (since C++11)

Computes area hyperbolic cosine of `arg`.

### [edit] Parameters

arg | - | value of a floating-point or Integral type

### [edit] Return value

Inverse hyperbolic cosine of `arg`.

### [edit] See also

asinh (C++11) | area hyperbolic sine (function) [edit]
atanh (C++11) | area hyperbolic tangent (function) [edit]
cosh | computes hyperbolic cosine (ch(x)) (function) [edit]
acosh(std::complex) (C++11) | computes area hyperbolic cosine of a complex number (function template) [edit]
C documentation for acosh

### [edit] External links

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

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