NAME¶

SDL_acos - Compute the arc cosine of x .

HEADER FILE¶

Defined in SDL3/SDL_stdinc.h

SYNOPSIS¶

#include "SDL3/SDL.h"

double SDL_acos(double x);

DESCRIPTION¶

The definition of y=acos(x) is x=cos(y) .

Domain: -1<=x<=1 Range: 0<=y<=Pi This function operates on double-precision floating point values, use

SDL_acosf
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.

FUNCTION PARAMETERS¶

x

floating point value.

RETURN VALUE¶

Returns arc cosine of x , in radians.

THREAD SAFETY¶

It is safe to call this function from any thread.

AVAILABILITY¶

This function is available since SDL 3.1.3.

SEE ALSO¶

•(3), SDL_acosf(3), •(3), SDL_asin(3), •(3), SDL_cos(3)