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ATAN2(3)

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NAME    [Toc]    [Back]

       atan2 - arc tangent function of two variables

SYNOPSIS    [Toc]    [Back]

       #include <math.h>

       double atan2(double y, double x);

DESCRIPTION    [Toc]    [Back]

       The  atan2() function calculates the arc tangent of the two variables x
       and y.  It is similar to calculating the arc tangent of y /  x,	except
       that  the signs of both arguments are used to determine the quadrant of
       the result.

RETURN VALUE    [Toc]    [Back]

       The atan2() function returns the result in radians,  which  is  between
       -PI and PI (inclusive).

CONFORMING TO    [Toc]    [Back]

       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO    [Toc]    [Back]

      
      
       acos(3), asin(3), atan(3), cos(3), sin(3), tan(3)



				  1993-06-08			      ATAN2(3)
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