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## Cos
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Return the cosine of the parameter
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### Declaration
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```glsl
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float cos(float angle)
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vec2 cos(vec2 angle)
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vec3 cos(vec3 angle)
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vec4 cos(vec4 angle)
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```
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### Parameters
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```angle``` specify the quantity, in radians, of which to return the cosine.
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### Description
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```cos()``` returns the trigonometric sine of angle.
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<div class="simpleFunction" data="y = cos(x); "></div>
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### See Also
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[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/)
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