thebookofshaders/glossary/cos.md
2015-04-18 10:41:34 -04:00

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## Cos
Return the cosine of the parameter
### Declaration
```glsl
float cos(float angle)
vec2 cos(vec2 angle)
vec3 cos(vec3 angle)
vec4 cos(vec4 angle)
```
### Parameters
```angle``` specify the quantity, in radians, of which to return the cosine.
### Description
```cos()``` returns the trigonometric sine of angle.
<div class="simpleFunction" data="y = cos(x); "></div>
### See Also
[acos](index.html#acos.md), [sin](index.html#sin.md), [asin](index.html#asin.md), [tan](index.html#tan.md), [atan](index.html#atan.md), [Chapter 05: Shaping Functions](../05/)