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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.\" Japanese Version Copyright (c) 2003 Akihiro MOTOKI
.\" all rights reserved.
.\" Translated Thu Jul 24 00:43:35 JST 2003
.\" by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.\"WORD: hyperbolic ж()
.\"WORD: arc sine
.\"WORD: arc cosine ;
.\"WORD: arc tangent
.\"WORD: real part
.\"WORD: imaginary part
.\"
.TH CATANH 3 2002-07-28 "" "complex math routines"
.SH ̾
catanh, catanhf, catanhl \- ʣǿεж (arc tangents hyperbolic)
.SH
.B #include <complex.h>
.sp
.BI "double complex catanh(double complex " z );
.br
.BI "float complex catanhf(float complex " z );
.br
.BI "long double complex catanhl(long double complex " z );
.sp
\-lm ǥ롣
.SH
catanh() ؿʣǿ atanh() 롣
y = catanh(z) ʤС z = ctanh(y) Ω롣
y εͤ϶ [-pi/2,pi/2] 롣
.LP
δطΩ: catanh(z) = 0.5*clog((1+z)/(1-z))
.SH
C99
.SH Ϣ
.BR atanh (3),
.BR cabs (3),
.BR cimag (3),
.BR complex (5)
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