acos(3F)                                                 acos(3F)



     NAME
          acos, dacos - Fortran arccosine intrinsic function

     SYNOPSIS
          real r1, r2
          double precision dp1, dp2

          r2=acos(r1)

          dp2=dacos(dp1)
          dp2=acos(dp1)

     DESCRIPTION
          acos returns the real arccosine of its real argument.  dacos
          returns the double-precision arccosine of its double-
          precision argument.  The generic form acos may be used with
          impunity because its argument determines the type of the re-
          turned value.

     SEE ALSO
          trig(3M).


































     April, 1990                                                     1