# ASINH

> Calculate the hyperbolic arc sine (inverse hyperbolic sine) of a number, returning an angle in radians using SQL in StackQL.

Source: https://stackql.io/language-spec/functions/math/trigonometric/asinh

Calculates the hyperbolic arc sine (inverse hyperbolic sine) of a number, which is the value \( \theta \) in radians whose hyperbolic sine is the specified number.

See also:  
[[`SELECT`]](/language-spec/select)

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## Syntax

```sql
SELECT ASINH(value) FROM <multipartIdentifier>;
```

## Arguments

__*value*__  
A numeric expression for which the hyperbolic arc sine is to be calculated.

## Return Value(s)
Returns the hyperbolic arc sine of the specified value in radians.

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## Examples

### Calculate the hyperbolic arc sine of 0.5

```sql
SELECT ASINH(0.5) AS hyperbolic_arc_sine_value;
```

This query returns approximately `0.4812`, as the hyperbolic arc sine of 0.5 is about 0.4812 radians.

### Calculate the hyperbolic arc sine of -1

```sql
SELECT ASINH(-1) AS hyperbolic_arc_sine_value;
```

This query calculates the hyperbolic arc sine of -1, resulting in approximately `-0.8814`, as this is the value in radians whose hyperbolic sine is -1.