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+'\" t
+.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
+.\"
+.\" SPDX-License-Identifier: GPL-1.0-or-later
+.\"
+.TH ccos 3 2023-10-31 "Linux man-pages 6.06"
+.SH NAME
+ccos, ccosf, ccosl \- complex cosine function
+.SH LIBRARY
+Math library
+.RI ( libm ", " \-lm )
+.SH SYNOPSIS
+.nf
+.B #include <complex.h>
+.P
+.BI "double complex ccos(double complex " z );
+.BI "float complex ccosf(float complex " z );
+.BI "long double complex ccosl(long double complex " z );
+.fi
+.SH DESCRIPTION
+These functions calculate the complex cosine of
+.IR z .
+.P
+The complex cosine function is defined as:
+.P
+.in +4n
+.EX
+ccos(z) = (exp(i * z) + exp(\-i * z)) / 2
+.EE
+.in
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface Attribute Value
+T{
+.na
+.nh
+.BR ccos (),
+.BR ccosf (),
+.BR ccosl ()
+T} Thread safety MT-Safe
+.TE
+.SH STANDARDS
+C11, POSIX.1-2008.
+.SH HISTORY
+glibc 2.1.
+C99, POSIX.1-2001.
+.SH SEE ALSO
+.BR cabs (3),
+.BR cacos (3),
+.BR csin (3),
+.BR ctan (3),
+.BR complex (7)