1COS(3)                     Linux Programmer's Manual                    COS(3)
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NAME

6       cos, cosf, cosl - cosine function
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SYNOPSIS

9       #include <math.h>
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11       double cos(double x);
12       float cosf(float x);
13       long double cosl(long double x);
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15       Link with -lm.
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DESCRIPTION

18       The  cos()  function returns the cosine of x, where x is given in radi‐
19       ans.
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RETURN VALUE

22       The cos() function returns a value between -1 and 1.
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CONFORMING TO

25       SVr4, 4.3BSD, C99.  The float and long double variants are C99 require‐
26       ments.
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SEE ALSO

29       acos(3), asin(3), atan(3), atan2(3), ccos(3), sin(3), tan(3)
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33                                  2002-07-27                            COS(3)