thebookofshaders/glossary/asin/README.md
2017-08-23 11:34:44 +02:00

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## Asin
Return the arcsine of the parameter
### Declaration
```glsl
float asin(float x)
vec2 asin(vec2 x)
vec3 asin(vec3 x)
vec4 asin(vec4 x)
```
### Parameters
```x``` specify the value whose arcsine to return.
### Description
```asin()``` returns the angle whose trigonometric sine is ```x```.
<div class="simpleFunction" data="y = asin(x); "></div>
### See Also
[cos](/glossary/?search=cos), [sin](/glossary/?search=sin), [acos](/glossary/?search=acos), [tan](/glossary/?search=tan), [atan](/glossary/?search=atan), [Chapter 05: Shaping Functions](/05/)