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