> ## Documentation Index
> Fetch the complete documentation index at: https://docs.firebolt.io/llms.txt
> Use this file to discover all available pages before exploring further.

> Reference material for ASINH function

# ASINH

Calculates the inverse hyperbolic sine (area hyperbolic sine) of a value.

## Syntax

```sql theme={"theme":{"light":"css-variables","dark":"css-variables"}}
ASINH(<value>)
```

## Parameters

| Parameter | Description                                                         | Supported input type |
| :-------- | :------------------------------------------------------------------ | :------------------- |
| `<value>` | The number that the inverse hyperbolic sine function is applied to. | `DOUBLE_PRECISION`   |

## Return Type

`ASINH` returns a value of type `DOUBLE_PRECISION`. It is defined for every real argument.

## Example

The inverse hyperbolic sine of 0 is 0:

<div className="query-window">
  ```
  SELECT ASINH(0) as result;
  ```

  | result <span>double</span> |
  | :------------------------- |
  | 0                          |

  <p><span>Rows: 1</span><span>Execution time: 5.21ms</span></p>
</div>

`ASINH` undoes `SINH`, and `SINH(LN(2))` is `0.75`, so this returns `LN(2)`:

<div className="query-window">
  ```
  SELECT ASINH(0.75) as result;
  ```

  | result <span>double</span> |
  | :------------------------- |
  | 0.6931471805599453         |

  <p><span>Rows: 1</span><span>Execution time: 5.21ms</span></p>
</div>