GNU/Linux |
CentOS 4.8 |
i386 |
cacos(3) |
cacos, cacosf, cacosl − complex arc cosine
#include <complex.h>
double complex cacos(double complex z);
float complex cacosf(float complex z);
long double complex cacosl(long double complex z);
The cacos() function calculates the complex acos(). If y = cacos(z), then z = ccos(y). The real part of y is chosen in the interval [0,pi].
One has cacos(z) = -i clog(z+csqrt(z*z-1)).
C99
clog(3), ccos(3)
cacos(3) |