hpux man page for atan2d64

atan2d64(3M)															      atan2d64(3M)

NAME
       atan2d64(), atan2d128(), atan2d32() - decimal arctangent and quadrant functions

SYNOPSIS
DESCRIPTION
       The function returns the arctangent of y/x, using the signs of both arguments to determine the quadrant of the return value.

       is a version of it takes arguments and returns a result.

       is a version of it takes arguments and returns a result.

       These math functions are supported for HP-UX 11i Version 3 September 2008 Update and forward.

USAGE
       To use any of these functions, compile with the option.

       Make sure your program defines and then includes

       Link in the math library by specifying or on the linking command line.

       For more information, see the at the following site:

RETURN VALUE
       If y and x is -0,

       If y and x is +0,

       If y and x is less than 0, returns

       If y and x is greater than 0, returns

       If y is less than 0 and x is 0, returns

       If y is greater than 0 and x is 0, returns

       If y is greater than 0 and x is -infinity, returns

       If y is less than 0 and x is -infinity,

       If y is greater than 0 and x is infinity, returns +0.

       If y is less than 0 and x is infinity, returns -0.

       If y and x is finite, returns

       If y and x is -infinity, returns

       If y and x is +infinity, returns

       If x or y is NaN, returns NaN.

       raises the inexact exception whenever a rounded result does not equal the mathematical result.

ERRORS
       No errors are defined.

SEE ALSO
       acosd64(3M), asind64(3M), atand64(3M), cosd64(3M), sind64(3M), tand64(3M), math(5).

STANDARDS CONFORMANCE
       These functions conform to ISO/IEC TR 24732, "Extension for the programming language C to support decimal floating-point arithmetic".

							     HP Integrity Server Only						      atan2d64(3M)