SDL_acos - Compute the arc cosine of x.

       This function is available since SDL 3.2.0.

       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.

x      floating point value.

       SDL_acos - Compute the arc cosine of x.

       Returns arc cosine of x, in radians.

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

Simple Directmedia Layer                           SDL 3.2.20                                        SDL_acos(3)

#include<SDL3/SDL_stdinc.h>doubleSDL_acos(doublex);

       It is safe to call this function from any thread.