NAME
cacos, cacosf,
cacosl —
complex circular 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);
DESCRIPTION
The
cacos(),
cacosf()
and
cacosl()
functions compute the complex circular arc cosine of
z.
For all complex floating-point numbers z,
cacos(z) = Pi/2 - casin(z).
RETURN VALUES
The cacos(),
cacosf() and cacosl()
functions return the complex circular arc cosine of z
with unbounded imaginary part, and real part in the interval [0, Pi].
SEE ALSO
STANDARDS
The cacos(),
cacosf() and cacosl()
functions conform to ISO/IEC 9899:1999
(“ISO C99”).