# Math.Atanh(Double) Metoda

## Definicja

Returns the angle whose hyperbolic tangent is the specified number.Returns the angle whose hyperbolic tangent is the specified number.

``````public:
static double Atanh(double d);``````
``public static double Atanh (double d);``
``static member Atanh : double -> double``
``Public Shared Function Atanh (d As Double) As Double``

#### Parametry

d
Double

A number representing a hyperbolic tangent, where `d` must be greater than or equal to -1, but less than or equal to 1.A number representing a hyperbolic tangent, where `d` must be greater than or equal to -1, but less than or equal to 1.

#### Zwraca

An angle, θ, measured in radians, such that -∞ < θ < -1, or 1 < θ < ∞.An angle, θ, measured in radians, such that -∞ < θ < -1, or 1 < θ < ∞.

lub-or- NaN if `d` < -1 or `d` > 1 or `d` equals NaN.NaN if `d` < -1 or `d` > 1 or `d` equals NaN.

## Uwagi

Multiply the return value by 180/Math.PI to convert from radians to degrees.Multiply the return value by 180/Math.PI to convert from radians to degrees.