NAME
cos,
cosf
- cosine function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
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 C89'') .