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COS(3)                     Library Functions Manual                     COS(3)

NAME
     cos, cosf -- cosine function

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <&lt;math.h>&gt;

     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'').

NetBSD 6.1.5                      May 2, 1991                     NetBSD 6.1.5