ccos, ccosf, ccosl — complex cosine function


#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.


These functions calculate the complex cosine of z.

The complex cosine function is defined as:

    ccos(z) = (exp(i * z) + exp(-i * z)) / 2


These functions first appeared in glibc in version 2.1.


For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
ccos(), ccosf(), ccosl() Thread safety MT-Safe

Conforming to

C99, POSIX.1-2001, POSIX.1-2008.

See Also

cabs(3), cacos(3), csin(3), ctan(3), complex(7)


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Referenced By

cacos(3), catan(3), complex(7), cos(3), cosh(3), csin(3), ctan(3).

The man pages ccosf(3) and ccosl(3) are aliases of ccos(3).

2017-09-15 Linux Programmer's Manual