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 9.3                     September 2, 2019                    NetBSD 9.3