function
<cmath> <ctgmath>
atanh
double atanh (double x); float atanhf (float x);long double atanhl (long double x);
double atanh (double x); float atanh (float x);long double atanh (long double x); double asinh (T x); // additional overloads for integral types
Compute area hyperbolic tangent
Returns the area hyperbolic tangent of x.
The area hyperbolic tangent is the inverse operation of the hyperbolic tangent.
Header
<tgmath.h> provides a type-generic macro version of this function.
Parameters
- x
- Value whose area hyperbolic tangent is computed, in the interval
[-1,+1].
If the argument is out of this interval, a domain error occurs.
For values of -1 and +1, a pole error may occur.
Example
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/* atanh example */
#include <stdio.h> /* printf */
#include <math.h> /* tanh, atanh */
int main ()
{
double param, result;
param = tanh(1);
result = atanh(param) ;
printf ("The area hyperbolic tangent of %f is %f.\n", param, result);
return 0;
}
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Output:
The area hyperbolic tangent of 0.761594 is 1.000000.
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See also
- tanh
- Compute hyperbolic tangent (function)
- asinh
- Compute area hyperbolic sine (function)
- acosh
- Compute area hyperbolic cosine (function)