(This is the legacy documentation for SDL2, the previous stable version; SDL3 is the current stable version.)

SDL_acos

Use this function to compute arc cosine of x.

Header File

Defined in SDL_stdinc.h

Syntax

double SDL_acos(double x);

Function Parameters

double

x

floating point value, in radians.

Return Value

(double) Returns arc cosine of x.

Remarks

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

Domain: -1 <= x <= 1

Range: 0 <= y <= Pi

Version

This function is available since SDL 2.0.2.

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CategoryAPI, CategoryAPIFunction, CategoryStdInc

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