atan2(3F)                                               atan2(3F)



     NAME
          atan2, datan2 - FORTRAN arctangent intrinsic function

     SYNOPSIS
          real r1, r2, r3
          double precision dp1, dp2, dp3

          r3 = atan2(r1, r2)

          dp3 = datan2(dp1, dp2)
          dp3 = atan2(dp1, dp2)

     DESCRIPTION
          atan2 returns the arctangent of arg1/arg2 as a real value.
          datan2 returns the double-precision arctangent of its
          double-precision arguments.  The generic form atan2 may be
          used with impunity with double-precision arguments.

     SEE ALSO
          trig(3M).



































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