NAME

ccos, ccosf, ccosl — complex circular cosine

SYNOPSIS

Math Library (libm, -lm)
#include <complex.h>

double complex
ccos(double complex z);

float complex
ccosf(float complex z);

long double complex
ccosl(long double complex z);

DESCRIPTION

The ccos(), ccosf() and ccosl() functions compute the complex circular cosine of z.

If z = x + iy, then

ccos(z) = cos(x) cosh(y) - i sin(x) sinh(y).

RETURN VALUES

The ccos(), ccosf() and ccosl() functions return the complex circular cosine of z.

SEE ALSO

csin(3), ctan(3)

STANDARDS

The ccos(), ccosf() and ccosl() functions conform to ISO/IEC 9899:1999 (“ISO C99”).