man3/ccos.3

   1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
   2 .\"
   3 .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
   4 .\" Distributed under GPL
   5 .\" %%%LICENSE_END
   6 .\"
   7 .TH CCOS 3 2017-09-15 "" "Linux Programmer's Manual"
   8 .SH NAME
   9 ccos, ccosf, ccosl \- complex cosine function
  10 .SH SYNOPSIS
  11 .B #include <complex.h>
  12 .PP
  13 .BI "double complex ccos(double complex " z ");"
  14 .br
  15 .BI "float complex ccosf(float complex " z ");"
  16 .br
  17 .BI "long double complex ccosl(long double complex " z ");"
  18 .PP
  19 Link with \fI\-lm\fP.
  20 .SH DESCRIPTION
  21 These functions calculate the complex cosine of
  22 .IR z .
  23 .PP
  24 The complex cosine function is defined as:
  25 .PP
  26 .nf
  27     ccos(z) = (exp(i * z) + exp(\-i * z)) / 2
  28 .fi
  29 .SH VERSIONS
  30 These functions first appeared in glibc in version 2.1.
  31 .SH ATTRIBUTES
  32 For an explanation of the terms used in this section, see
  33 .BR attributes (7).
  34 .TS
  35 allbox;
  36 lbw24 lb lb
  37 l l l.
  38 Interface       Attribute       Value
  39 T{
  40 .BR ccos (),
  41 .BR ccosf (),
  42 .BR ccosl ()
  43 T}      Thread safety   MT-Safe
  44 .TE
  45 .sp 1
  46 .SH CONFORMING TO
  47 C99, POSIX.1-2001, POSIX.1-2008.
  48 .SH SEE ALSO
  49 .BR cabs (3),
  50 .BR cacos (3),
  51 .BR csin (3),
  52 .BR ctan (3),
  53 .BR complex (7)