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ATANH
Section: Linux Programmer's Manual (3)Updated: June 13, 1993
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#include <math.h> double atanh(double x);
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atanh() ´Ø¿ô¤Ï x ¤ÎµÕÁжÊÀþÀµÀÜ ¡Ê¥¢¡¼¥¯¥Ï¥¤¥Ñ¥Ü¥ê¥Ã¥¯¥¿¥ó¥¸¥§¥ó¥È¡Ë¤ò·×»»¤¹¤ë¡£¤¹¤Ê¤ï¤Á¡¢ ¤½¤ÎÁжÊÀþÀµÀܡʥϥ¤¥Ñ¥Ü¥ê¥Ã¥¯¥¿¥ó¥¸¥§¥ó¥È¡Ë¤¬ x ¤Ë¤Ê¤ë ¤è¤¦¤ÊÃͤǤ¢¤ë¡£¤â¤·¡¢ x ¤ÎÀäÂÐÃͤ¬1.0¤è¤êÂ礤±¤ì¤Ðatanh() (ÌõÃí¡§¸¶Ê¸¤Ç¤Ï acosh() ¤Ë¤Ê¤Ã¤Æ¤¤¤Þ¤·¤¿¤¬¡¢ ÌÀ¤é¤«¤Ê½ñ¤´Ö°ã¤¤¤Ç¤¹)¤Ï not-a-number (NaN) ¤òÊÖ¤·¡¢errno ¤¬ ÀßÄꤵ¤ì¤ë¡£
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SVID 3, POSIX, BSD 4.3, ISO 9899´ØÏ¢¹àÌÜ
asinh(3), acosh(3), cosh(3), sinh(3), tanh(3)