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'') .