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ATAN2
Section: Linux Programmer's Manual (3)Updated: June 8, 1993
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NAME
atan2 - Æó¤Ä¤ÎÊÑ¿ô¤ËÂФ¹¤ëµÕÀµÀÜ¡Ê¥¢¡¼¥¯¥¿¥ó¥¸¥§¥ó¥È¡Ë´Ø¿ô½ñ¼°
#include <math.h> double atan2(double y, double x);
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atan2() ´Ø¿ô¤ÏÆó¤Ä¤ÎÊÑ¿ô x and y ¤ËÂФ¹¤ë µÕÀµÀÜ¡Ê¥¢¡¼¥¯¥¿¥ó¥¸¥§¥ó¥È¡Ë¤ò·×»»¤¹¤ë¡£ ¤³¤ì¤Ï¡¢ y / x ¤ÎµÕÀµÀܤò·×»»¤·¡¢ Æó¤Ä¤Î°ú¿ô¤ÎÉä¹æ¤Ï·ë²Ì¤Î¾Ý¸Â¤ò·èÄꤹ¤ë¤¿¤á¤Ë»È¤ï¤ì¤ë¡£ÊÖ¤êÃÍ
atan2() ´Ø¿ô¤Ï·ë²Ì¤ò¥é¥¸¥¢¥óñ°Ì¤ÇÊÖ¤·¡¢ÃÍ¤Ï -PI ¤È PI ¡Êξü¤ò´Þ¤à¡Ë ¤Ç¤¢¤ë¡£½àµò
SVID 3, POSIX, BSD 4.3, ISO 9899´ØÏ¢¹àÌÜ
acos(3), asin(3), atan(3), cos(3), sin(3), tan(3)