cos(3) - NetBSD Manual Pages

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COS(3)                  NetBSD Library Functions Manual                 COS(3)


NAME
cos, cosf, cosl -- cosine function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h> double cos(double x); float cosf(float x); long double cosl(long double x);
DESCRIPTION
The cos(), cosf(), and cosl() 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'').
HISTORY
A cos() function appeared in Version 1 AT&T UNIX. NetBSD 9.1 September 2, 2019 NetBSD 9.1
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