COS(3)
Library Functions Manual
COS(3)
NAME
cos
,
cosf
—
cosine function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <
math.h
>
double
cos
(
double x
);
float
cosf
(
float x
);
DESCRIPTION
The
cos
() and
cosf
() functions compute the cosine of
x
(measured in radians). A large magnitude argument may yield a result with little or no significance. For a discussion of error due to roundoff, see
math(3)
.
RETURN VALUES
The
cos
() function returns the cosine value.
SEE ALSO
acos(3)
,
asin(3)
,
atan(3)
,
atan2(3)
,
cosh(3)
,
math(3)
,
sin(3)
,
sinh(3)
,
tan(3)
,
tanh(3)
STANDARDS
The
cos
() function conforms to ANSI X3.159-1989 (“ANSI C”).
May 2, 1991
NetBSD 5.99