EMC Variable Programming

Good morning all.

Having a little trouble with variables.

First I went into the emc.var table and added parameters:

1000 3.000
1001 0.020
1002 60
1003 125

Here is my program:

G18
G20
M3S1
M8
#1009 = [[#1000 + #1001]/2]
G00X[#1009[cos#1002]]Z[#1009[sin#1002]]
G00Z1.00
M5
M9
M2

I ran the program numerous times and could not see the #1009 being updated
so I gave up. A while later I happened to look at the emc.var again and saw
the #1009, so it did update at some point.

I had the emc.var open as a text file. Is there a way to refresh the view a
la f5 in Windows? I kept closing and opening it to make sure what I was
seeing (or not seeing) was real.

What am I doing wrong? Is my syntax correct?

Thanks.

Ethan