man3/csin.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 CSIN 3 2015-04-19 "" "Linux Programmer's Manual"
   8 .SH NAME
   9 csin, csinf, csinl \- complex sine function
  10 .SH SYNOPSIS
  11 .B #include <complex.h>
  12 .PP
  13 .BI "double complex csin(double complex " z ");"
  14 .br
  15 .BI "float complex csinf(float complex " z );
  16 .br
  17 .BI "long double complex csinl(long double complex " z ");"
  18 .PP
  19 Link with \fI\-lm\fP.
  20 .SH DESCRIPTION
  21 These functions calculate the complex sine of
  22 .IR z .
  23
  24 The complex sine function is defined as:
  25 .nf
  26
  27     csin(z) = (exp(i * z) \- exp(\-i * z)) / (2 * i)
  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 csin (),
  41 .BR csinf (),
  42 .BR csinl ()
  43 T}      Thread safety   MT-Safe
  44 .TE
  45
  46 .SH CONFORMING TO
  47 C99, POSIX.1-2001, POSIX.1-2008.
  48 .SH SEE ALSO
  49 .BR cabs (3),
  50 .BR casin (3),
  51 .BR ccos (3),
  52 .BR ctan (3),
  53 .BR complex (7)