man3/csin.3

   1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
   2 .\"
   3 .\" SPDX-License-Identifier: GPL-1.0-or-later
   4 .\"
   5 .TH CSIN 3 2021-03-22 "Linux man-pages (unreleased)"
   6 .SH NAME
   7 csin, csinf, csinl \- complex sine function
   8 .SH LIBRARY
   9 Math library
  10 .RI ( libm ", " \-lm )
  11 .SH SYNOPSIS
  12 .nf
  13 .B #include <complex.h>
  14 .PP
  15 .BI "double complex csin(double complex " z );
  16 .BI "float complex csinf(float complex " z );
  17 .BI "long double complex csinl(long double complex " z );
  18 .fi
  19 .SH DESCRIPTION
  20 These functions calculate the complex sine of
  21 .IR z .
  22 .PP
  23 The complex sine function is defined as:
  24 .PP
  25 .in +4n
  26 .EX
  27 csin(z) = (exp(i * z) \- exp(\-i * z)) / (2 * i)
  28 .EE
  29 .in
  30 .SH VERSIONS
  31 These functions first appeared in glibc in version 2.1.
  32 .SH ATTRIBUTES
  33 For an explanation of the terms used in this section, see
  34 .BR attributes (7).
  35 .ad l
  36 .nh
  37 .TS
  38 allbox;
  39 lbx lb lb
  40 l l l.
  41 Interface       Attribute       Value
  42 T{
  43 .BR csin (),
  44 .BR csinf (),
  45 .BR csinl ()
  46 T}      Thread safety   MT-Safe
  47 .TE
  48 .hy
  49 .ad
  50 .sp 1
  51 .SH STANDARDS
  52 C99, POSIX.1-2001, POSIX.1-2008.
  53 .SH SEE ALSO
  54 .BR cabs (3),
  55 .BR casin (3),
  56 .BR ccos (3),
  57 .BR ctan (3),
  58 .BR complex (7)