###### (This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)

# SDL_cos

Compute the cosine of `x`

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Defined in <SDL3/SDL_stdinc.h>

## Syntax

`double SDL_cos(double x);`

## Function Parameters

**x** |
floating point value, in radians |

## Return Value

Returns cosine of `x`

Domain: `-INF <= x <= INF`

Range: `-1 <= y <= 1`

This function operates on double-precision floating point values, use SDL_cosf for single-precision floats.

This function may use a different approximation across different versions, platforms and configurations. i.e, it can return a different value given the same input on different machines or operating systems, or if SDL is updated.

## Version

This function is available since SDL 3.0.0.

## See Also

CategoryAPI, CategoryAPIFunction, CategoryStdinc