Section: Linux Programmer's Manual (3) Updated: 2008-08-11 Local index
cacos, cacosf, cacosl - complex arc cosine
double complex cacos(double complex z);
float complex cacosf(float complex z);
long double complex cacosl(long double complex z);
Link with -lm.
function calculates the complex arc cosine of
If y = cacos(z), then z = ccos(y).
The real part of
is chosen in the interval [0,pi].
cacos(z) = -i clog(z + csqrt(z * z - 1))
These functions first appeared in glibc in version 2.1.
This page is part of release 3.27 of the Linux
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and information about reporting bugs,
can be found at
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Time: 21:43:04 GMT, April 16, 2011