1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
3 .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
4 .\" Distributed under GPL
7 .TH CASINH 3 2008-08-11 "" "Linux Programmer's Manual"
9 casinh, casinhf, casinhl \- complex arc sine hyperbolic
11 .B #include <complex.h>
13 .BI "double complex casinh(double complex " z );
15 .BI "float complex casinhf(float complex " z );
17 .BI "long double complex casinhl(long double complex " z );
23 function calculates the complex arc hyperbolic sine of
25 If \fIy\ =\ casinh(z)\fP, then \fIz\ =\ csinh(y)\fP.
28 is chosen in the interval [\-pi/2,pi/2].
33 casinh(z) = clog(z + csqrt(z * z + 1))
36 These functions first appeared in glibc in version 2.1.