# by Joseph_Sixpack

Go to the Index of "The Last Book of GW-BASIC"
```Okay, here it is.  A very simple concept that can pay off
big and save you a lot of time in looking for your six
dollar scientific calculator.
(that's supposed to be a joke  :-)

Here is a tiny program that you can set up to run in a batch
file or by memory when you startup GW-BASIC for machine shop
purposes or for trig problems.  The program is called
STARTUP.BAS and it goes like this:

If you are home alone, and aren't using a batch file the
command from the prompt goes something like this:

gwbasic[.exe] startup[.bas]  (bracket content optional)
let me make that cleaner sans brackets:
gwbasic startup
that's it.
here is what the program looks like:

1  cls
2  key off
3  locate ,,,0,7
4  pi=4*atn(1)
5  r2d=pi/180
6  print tab(10) "The Value of PI=";pi
7  print tab(10) "The value of the radians to degrees factor is:"
8  print tab(10) "PI/180=";r2d
9  print "So to find the sine of 45 degrees for example"
10  print "enter the question mark for the shorthand version"
11  print "of print & then:    sin(45*r2d)    this will give"
12  print "you the value of the sine of 45 degrees in degrees"
13  print "and not value in radians."
14 '  save"startup.bas", A
15 '  system

After a while, you can just delete all the blab if you want
from lines 6 to 13 and just keep it simple to just
establish the value of the conversion factor contained in
the variable "r2d"

That's it!  all first five lines, and lines 14 & 15 if you
want.

If you wanna show off you can get the startup program down
to just 1 to 3 lines if you want.

1 cls:key off:locate,,,0,7:pi=4*atn(1):r2d=pi/180
2 save"startup.bas",a:'   system

All you are doing is just creating the value for PI and a
conversion factor called (r2d) "radians to degrees" to
translate the radian return for trig functions in gw-basic
to degrees.

Other semi-automatic math thingys can be done too if the
need be.

But for Joseph_Sixpacks who just crank handles, all you
mostly need is the trig stuff and simple multiplication and