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 ⇤ ← Revision 2 as of 2014-07-04 02:56:12 → Size: 1571 Editor: dthree Comment: Added some trivial examples. ← Revision 3 as of 2014-07-04 02:59:07 → ⇥ Size: 1616 Editor: dthree Comment: Added domain and range (for real numbers). Deletions are marked like this. Additions are marked like this. Line 57: Line 57: Domain: -1 <= x <= 1Range: 0 <= y <= Pi
 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\n", 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\n", 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 in >= SDL 2.0.2.

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

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