NAME    [Toc]    [Back]

     cos, cosf - cosine function

LIBRARY    [Toc]    [Back]

     Math Library (libm, -lm)

SYNOPSIS    [Toc]    [Back]

     #include <math.h>

     double
     cos(double x);

     float
     cosf(float x);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

     The cos() function returns the cosine value.

SEE ALSO    [Toc]    [Back]

     acos(3), asin(3), atan(3), atan2(3), cosh(3), math(3), sin(3), sinh(3),
     tan(3), tanh(3)

STANDARDS    [Toc]    [Back]

     The cos() function conforms to ANSI X3.159-1989 (``ANSI C'').

BSD                               May 2, 1991                              BSD