ACOS(3F)                             SysV                             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 as its argument will determine the
     type of the returned value.

SEE ALSO
     trig(3M).