# Math.Asinh(Double) Method

## Definition

Returns the angle whose hyperbolic sine is the specified number.

```
public:
static double Asinh(double d);
```

`public static double Asinh (double d);`

`static member Asinh : double -> double`

`Public Shared Function Asinh (d As Double) As Double`

#### Parameters

- d
- Double

A number representing a hyperbolic sine, where `d`

must be greater than or equal to NegativeInfinity, but less than or equal to PositiveInfinity.

#### Returns

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

-or-

## Remarks

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

This method calls into the underlying C runtime, and the exact result or valid input range may differ between different operating systems or architectures.