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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.TH CASINH 3 2002-07-28 "" "complex math routines"
.SH NAME
casinh, casinhf, casinhl \- complex arc sine hyperbolic
.SH SYNOPSIS
.B #include <complex.h>
.sp
.BI "double complex casinh(double complex " z );
.sp
.BI "float complex casinhf(float complex " z );
.sp
.BI "long double complex casinhl(long double complex " z );
.sp
Link with \-lm.
.SH DESCRIPTION
The casinh() function calculates the complex asinh().
If y = casinh(z), then z = csinh(y).
The imaginary part of y is chosen in the interval [-pi/2,pi/2].
.LP
One has casinh(z) = clog(z+csqrt(z*z+1)).
.SH "CONFORMING TO"
C99
.SH "SEE ALSO"
.BR asinh (3),
.BR cabs (3),
.BR cimag (3),
.BR complex (5)
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