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2
3# Function asin
4
5Calculate the inverse sine of a value.
6
7For matrices, the function is evaluated element wise.
8
9
10## Syntax
11
12```js
13math.asin(x)
14```
15
16### Parameters
17
18Parameter | Type | Description
19--------- | ---- | -----------
20`x` | number &#124; BigNumber &#124; Complex &#124; Array &#124; Matrix | Function input
21
22### Returns
23
24Type | Description
25---- | -----------
26number &#124; BigNumber &#124; Complex &#124; Array &#124; Matrix | The arc sine of x
27
28
29## Examples
30
31```js
32math.asin(0.5) // returns number 0.5235987755982989
33math.asin(math.sin(1.5)) // returns number ~1.5
34
35math.asin(2) // returns Complex 1.5707963267948966 -1.3169578969248166 i
36```
37
38
39## See also
40
41[sin](sin.md),
42[atan](atan.md),
43[acos](acos.md)