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ATAN
Section: Linux Programmer's Manual (3)Updated: June 8, 1993
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#include <math.h> double atan(double x);
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atan() ´Ø¿ô¤ÏµÕÀµÀÜ¡Ê¥¢¡¼¥¯¥¿¥ó¥¸¥§¥ó¥È¡Ë¤ò¥é¥¸¥¢¥óñ°Ì¤ÇÊÖ¤·¡¢ ¿ô³ØŪ¤Ë¤Ï -PI/2 ¤È PI/2¡Êξü¤ò´Þ¤à¡Ë ¤Î´Ö¤Ë¤Ê¤ë¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£½àµò
SVID 3, POSIX, BSD 4.3, ISO 9899´ØÏ¢¹àÌÜ
acos(3), asin(3), atan2(3), cos(3), sin(3), tan(3)