man3/cexp.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 CEXP 3 2017-09-15 "" "Linux Programmer's Manual"
   8 .SH NAME
   9 cexp, cexpf, cexpl \- complex exponential function
  10 .SH SYNOPSIS
  11 .B #include <complex.h>
  12 .PP
  13 .BI "double complex cexp(double complex " z ");"
  14 .br
  15 .BI "float complex cexpf(float complex " z ");"
  16 .br
  17 .BI "long double complex cexpl(long double complex " z ");"
  18 .PP
  19 Link with \fI\-lm\fP.
  20 .SH DESCRIPTION
  21 These functions calculate e (2.71828..., the base of natural logarithms)
  22 raised to the power of
  23 .IR z .
  24 .PP
  25 One has:
  26 .PP
  27 .nf
  28     cexp(I * z) = ccos(z) + I * csin(z)
  29 .fi
  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 .TS
  36 allbox;
  37 lbw24 lb lb
  38 l l l.
  39 Interface       Attribute       Value
  40 T{
  41 .BR cexp (),
  42 .BR cexpf (),
  43 .BR cexpl ()
  44 T}      Thread safety   MT-Safe
  45 .TE
  46 .sp 1
  47 .SH CONFORMING TO
  48 C99, POSIX.1-2001, POSIX.1-2008.
  49 .SH SEE ALSO
  50 .BR cabs (3),
  51 .BR cexp2 (3),
  52 .BR clog (3),
  53 .BR cpow (3),
  54 .BR complex (7)