.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.TH CCOS 3 2007-12-26 "" "Linux Programmer's Manual"
.SH NAME
ccos, ccosf, ccosl \- complex cosine function
.SH SYNOPSIS
.B #include <complex.h>
.sp
.BI "double complex ccos(double complex " z ");"
.br
.BI "float complex ccosf(float complex " z ");"
.br
.BI "long double complex ccosl(long double complex " z ");"
.sp
Link with \fI\-lm\fP.
.SH DESCRIPTION
The complex cosine function is defined as:
.nf

    ccos(z) = (exp(i * z) + exp(\-i * z)) / 2
.fi
.SH "CONFORMING TO"
C99
.SH "SEE ALSO"
.BR cabs (3),
.BR csin (3),
.BR ctan (3),
.BR complex (7)