# Asin

Returns the arcsine (inverse sine) of a number

## Method Signature

```
Asin(number=[double])
```

### Arguments

| Argument | Type     | Required | Description                            | Default |
| -------- | -------- | -------- | -------------------------------------- | ------- |
| `number` | `double` | `true`   | The number to calculate the arcsine of |         |

## Examples

### Arcsine of 0.3

[Run Example](https://try.boxlang.io/?code=eJxLLM7M01DQM1bQtOYCABcvAuM%3D)

```java
asin( .3 );

```

Result: 0.3046926540153975

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJwrzsxLVbBVMLTmSinNLdBQcCzOzNNQKAaJaipoWnMp6OsrGOqZmhuYW5oZG5mZW5oqZOYpFCWmZCbmFXMBAA9GEHw%3D)

```java
sine = 1;
dump( Asin( sine ) );
 // 1.570796326795 in radians

```

## Related

* [Abs](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/abs)
* [Acos](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/acos)
* [Atn](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/atn)
* [Ceiling](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/ceiling)
* [Cos](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/cos)
* [DecrementValue](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/decrementvalue)
* [Exp](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/exp)
* [Fix](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/fix)
* [Floor](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/floor)
* [FormatBaseN](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/formatbasen)
* [IncrementValue](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/incrementvalue)
* [InputBaseN](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/inputbasen)
* [Int](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/int)
* [Log](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/log)
* [Log10](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/log10)
* [Max](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/max)
* [Min](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/min)
* [Pi](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/pi)
* [PrecisionEvaluate](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/precisionevaluate)
* [Rand](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/rand)
* [Randomize](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/randomize)
* [RandRange](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/randrange)
* [Round](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/round)
* [Sgn](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/sgn)
* [Sin](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/sin)
* [Sqr](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/sqr)
* [Tan](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/math/tan)