CCOS(3) Linux Programmer's Manual CCOS(3)

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

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

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