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CCOS(3) Linux Programmer's Manual CCOS(3) NAME ccos, ccosf, ccosl - complex cosine function SYNOPSIS #include <complex.h> double complex ccos(double complex z); float complex ccosf(float complex z); long double complex ccosl(long double complex z); Link with -lm. DESCRIPTION These functions calculate the complex cosine of z. The complex cosine function is defined as: ccos(z) = (exp(i * z) + exp(-i * z)) / 2 VERSIONS These functions first appeared in glibc in version 2.1. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ¬ββββββββββββββββ¬ββββββββββ βInterface β Attribute β Value β ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββΌββββββββββββββββΌββββββββββ€ βccos(), ccosf(), ccosl() β Thread safety β MT-Safe β ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ΄ββββββββββββββββ΄ββββββββββ CONFORMING TO C99, POSIX.1-2001, POSIX.1-2008. SEE ALSO cabs(3), cacos(3), csin(3), ctan(3), complex(7) 2021-03-22 CCOS(3)