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Command: acosf | Section: 3 | Source: MINIX | File: acosf.3
ACOS(3) FreeBSD Library Functions Manual ACOS(3)
NAME
acos, acosf, acosl - arc cosine function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
acos(double x);
float
acosf(float x);
long double
acosl(long double x);
DESCRIPTION
The acos(), acosf(), and acosl() functions compute the principal value of
the arc cosine of x in the range [0, pi].
RETURN VALUES
If |x|>1, acos(x), acosf(x), and acosl(x) set the global variable errno
to EDOM.
SEE ALSO
asin(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3), sinh(3),
tan(3), tanh(3)
STANDARDS
The acos() function conforms to ISO/IEC 9899:1999 ("ISO C99").
FreeBSD 14.1-RELEASE-p8 January 29, 2013 FreeBSD 14.1-RELEASE-p8