Inverse hyperbolic sine

# asinh

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

asinh — Inverse hyperbolic sine

### Description

asinh(float `$num`): float

Returns the inverse hyperbolic sine of `num`, i.e. the value whose hyperbolic sine is `num`.

### Parameters

`num`

  The argument to process

### Return Values

The inverse hyperbolic sine of `num`

### See Also

- sinh() - Hyperbolic sine
- asin() - Arc sine
- acosh() - Inverse hyperbolic cosine
- atanh() - Inverse hyperbolic tangent

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