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Differences between revisions 9 and 10
 ⇤ ← Revision 9 as of 2016-03-27 21:33:44 → Size: 1586 Editor: PhilippWiesemann Comment: Removed Related Functions section. ← Revision 10 as of 2016-06-10 19:54:38 → ⇥ Size: 1582 Editor: PhilippWiesemann Comment: Removed unnecessary \n for SDL_Log() from example. Deletions are marked like this. Additions are marked like this. Line 44: Line 44: SDL_Log("Pi/2 - asin(0):\t%f\n", M_PI / 2 - SDL_asin(0)); SDL_Log("Pi/2 - asin(0):\t%f", M_PI / 2 - SDL_asin(0)); Line 48: Line 48: SDL_Log("Pi - acos(-1):\t%f\n", M_PI - SDL_acos(-1)); SDL_Log("Pi - acos(-1):\t%f", M_PI - SDL_acos(-1));
 DRAFT

SDL_acos

Use this function to compute arc cosine of x.

Syntax

```double SDL_acos(double x)
```

Function Parameters

 x floating point value, in radians

Return Value

Returns arc cosine of x.

Code Examples

```    /* acos(x) = Pi/2 - asin(x) */
SDL_Log("acos(0):\t\t%f", SDL_acos(0));
SDL_Log("Pi/2 - asin(0):\t%f", M_PI / 2 - SDL_asin(0));

/* acos(-x) = Pi  - acos(x) */
SDL_Log("acos(-(-1)):\t%f", SDL_acos(-(-1)));
SDL_Log("Pi - acos(-1):\t%f", M_PI - SDL_acos(-1));
```

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.

None: SDL_acos (last edited 2016-06-10 19:54:38 by PhilippWiesemann)

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