cacosl(3) - Linux man page
Name
cacos, cacosf, cacosl - complex arc cosineSynopsis
#include <complex.h>double complex cacos(double complex z);
float complex cacosf(float complex z);
long double complex cacosl(long double complex z);
Link with -lm.
Description
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)).
