CACOS(3) complex math routines CACOS(3)

NAME cacos, cacosf, cacosl - complex arc cosine

SYNOPSIS #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)).


SEE ALSO ccos(3), clog(3), complex(7)

2002-07-28 CACOS(3)