NAME
cacos, cacosf, cacosl - complex arc cosine
SYNOPSIS
#include <complex.h>
I double complex cacos(double complex z );
I float complex cacosf(float complex z );
I long double complex cacosl(long double complex z );
Link with -lm.
DESCRIPTION
The
R 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)).
CONFORMING TO
C99
SEE ALSO
ČLÁNKY DO MAILU