[A83] Re: some none-programming questions

To: <assembly-83@lists.ticalc.org>
Subject: [A83] Re: some none-programming questions
From: "Ronald Teune" <rtwolf@gmx.net>
Date: Mon, 26 Nov 2001 18:46:19 +0100
Reply-To: assembly-83@lists.ticalc.org


>> From: "Ronald Teune" <rtwolf@gmx.net>
>>
>> > > From: "Ronald Teune" <rtwolf@gmx.net>
>> > >
>> > > Hi,
>> > >
>> > > here are some questions that I've always wanted to know, nobody knew
>> > > it, so I though I'll try here.
>> > >
>> > > 1 how to calculate pi?
>
>> > Well, the simplest formula I think is
>> >
>> > PI = 4 * ( 1/1 - 1/3 + 1/5 - 1/7 + ...)
>
>> Yeah, that's the simplest I've seen. I don't understand arctan right
>> now. It should be quite simple to do something with it (making a pi
>> calculator (JavaScript?) or so)
>
>In radian mode tan(pi/4)=1 and pi/4=arctan(1). In my example, the part
>between parenthesis is an approximation of arctan(1). 

Aha

>Btw, in dutch arctan
>is 'boogtangens' or 'bgtg'.

never heard of it...
I do know tan^-1 though.