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-'\" t
-.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
-.\"
-.\" SPDX-License-Identifier: GPL-1.0-or-later
-.\"
-.TH casinh 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-casinh, casinhf, casinhl \- complex arc sine hyperbolic
-.SH LIBRARY
-Math library
-.RI ( libm ", " \-lm )
-.SH SYNOPSIS
-.nf
-.B #include <complex.h>
-.PP
-.BI "double complex casinh(double complex " z );
-.BI "float complex casinhf(float complex " z );
-.BI "long double complex casinhl(long double complex " z );
-.fi
-.SH DESCRIPTION
-These functions calculate the complex arc hyperbolic sine of
-.IR z .
-If \fIy\~=\~casinh(z)\fP, then \fIz\~=\~csinh(y)\fP.
-The imaginary part of
-.I y
-is chosen in the interval [\-pi/2,pi/2].
-.PP
-One has:
-.PP
-.in +4n
-.EX
-casinh(z) = clog(z + csqrt(z * z + 1))
-.EE
-.in
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.ad l
-.nh
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.BR casinh (),
-.BR casinhf (),
-.BR casinhl ()
-T}	Thread safety	MT-Safe
-.TE
-.hy
-.ad
-.sp 1
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-glibc 2.1.
-C99, POSIX.1-2001.
-.SH SEE ALSO
-.BR asinh (3),
-.BR cabs (3),
-.BR cimag (3),
-.BR csinh (3),
-.BR complex (7)