1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
3 .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
4 .\" Distributed under GPL
7 .TH CCOS 3 2017-09-15 "" "Linux Programmer's Manual"
9 ccos, ccosf, ccosl \- complex cosine function
11 .B #include <complex.h>
13 .BI "double complex ccos(double complex " z ");"
15 .BI "float complex ccosf(float complex " z ");"
17 .BI "long double complex ccosl(long double complex " z ");"
21 These functions calculate the complex cosine of
24 The complex cosine function is defined as:
27 ccos(z) = (exp(i * z) + exp(\-i * z)) / 2
30 These functions first appeared in glibc in version 2.1.
32 For an explanation of the terms used in this section, see
38 Interface Attribute Value
43 T} Thread safety MT-Safe
47 C99, POSIX.1-2001, POSIX.1-2008.