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atanh, atanhf — ???ж????ܴؿ?

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Math Library (libm, -lm)

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<math.h> double atanh(double x) float atanhf(float x)

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atanh() ?????? atanhf() ?ؿ??ϡ??¿??ΰ??? x ?ε??ж????ܤ??׻????ޤ??? ?ݤ??ˤ????????ε????ϡ? math(3) ?򻲾Ȥ??Ƥ?????????

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atanh() ?????? atanhf() ?ؿ??ϡ??????????????ˤ? x ?ε??ж????ܤ??֤??ޤ??? VAX ?????? Tahoe ?Ǥϡ??????? 1 ?ʾ????ͤ????ľ????ˡ? atanh() ?ϥ??????Х??ѿ? errno ?? EDOM ?????ꤷ??ͽ?󤵤줿???ڥ????ɥե????Ȥ??????????ޤ???

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acosh(3), asinh(3), exp(3), math(3)

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atanh() ?ؿ??ϡ? 4.3BSD ???о줷?ޤ?????