Always had problems with the math formulas using pi they tried to teach us in grammar school - for example, why did they always insist pi are square when almost all pi are round?
Always had problems with the math formulas using pi they tried to teach us in grammar school - for example, why did they always insist pi are square when almost all pi are round?
So Devonai's concept solves your conundrum. But that's because it's rational, which proves it has nothing to do with pi.
Did I just say it was rational? "Two pi = one pie"? Sounds like a Democrat explaining why my fair share is bigger than their fair share until it comes to their fair share of what I have.
stay safe.
cornbread are square.Da hell you say?
Apple, with whipped cream.
PS. Pi are round, cornbread are square.
Pairs of first three odd numbers | ... | 113355 |
Split into two three-digit groups | ... | 113 _ 355 |
Swap the two groups, like so | ... | 355 _ 113 |
Write as ratio | ... | 355/113 |
Enjoy six digits of accuracy | ... | 3.14159292 |
[Real pi] | ... | 3.14159265359 |
Cornbread are round when cooked properly in a cast iron skillet. Silly yankee.
Cornbread are round when cooked properly in a cast iron skillet. Silly yankee.
Oh *expletive deleted* no we are NOT restarting the cornbread wars. The DMZ is the Mason Dixon line. Dont bring your Northern Cornbread of Aggression down hereI recall no declaration of peace
I recall no declaration of peace
I recall no declaration of peace
*Goes to white board*Why would you go to all that trouble when it would be easier just to remember 3.14? Those three digits alone will give you more accuracy than any real life measurements are likely to have in the first place.
*Writes*
... 113355 ... 113 _ 355 ... 355 _ 113 ... 355/113 ... 3.14159292 ... 3.14159265359
Many years ago (like 1983 or 1984) I read one of the FORTH programming books, which had a cool table of rational approximations of various useful constants (like e, pi, and so on), and this very compact "rational pi" was one of them.
The next rational approximation which is more accurate involves memorizing two 5-digit numbers having no apparent relation to one another. The 113355 --> 113 355 --> 355 113 --> 355/113 sequence is an easy mnemonic, so in my book it's a keeper.
Enjoy.
Don't you want a peace of pi ???I like pi
Why would you go to all that trouble when it would be easier just to remember 3.14? Those three digits alone will give you more accuracy than any real life measurements are likely to have in the first place.
I use that when I'm doing my moon shuttle gig. It helps cut down on the course corrections.
=D
It's one of those things you need as a programmer if you find yourself working on a small system (like embedded stuff) where the cost of implemented floating point math is just too great, either in extra circuitry or in extra memory. Under conditions where the programmer is confined to using fixed-point (scaled integer) math, calculations involving transcendental numbers can still be done using integer multiply/divide sequences. Need the area for a circle? Have radius? It's a simple matter to perform the integer multiplication: V = R x R x 355, and then the integer divide A = V / 113.
People using computers running modern CPUs and floating-point co-processors don't worry about stuff like this. People writing for 8-bit and 16-bit embedded processors have to pay attention to these things.
Yes, there are still systems that use low-end (inexpensive) processors, and you'd be amazed at the performance you can get from an 8051 or 6809 running at 12MHz if it's not running Windows or some other heavyweight OS.
*Goes to white board*
*Writes*
... 113355 ... 113 _ 355 ... 355 _ 113 ... 355/113 ... 3.14159292 ... 3.14159265359
Many years ago (like 1983 or 1984) I read one of the FORTH programming books, which had a cool table of rational approximations of various useful constants (like e, pi, and so on), and this very compact "rational pi" was one of them.
The next rational approximation which is more accurate involves memorizing two 5-digit numbers having no apparent relation to one another. The 113355 --> 113 355 --> 355 113 --> 355/113 sequence is an easy mnemonic, so in my book it's a keeper.
Enjoy.
This is literally one of the best things I've seen in a while. It is now my Facebook status and I definitely told people about it today.
Do people just look at you when you tell them stuff like that, nod and slowly back away?
Hey jackwagons, I got pie today! Sweet tater pie.Mmmm sweet taters pie.
#define pi 355/113;
:cool:
Yeah, a lot of people don't realize that many aircraft systems are still 8 or 16 bit.
I think the Airbus is 4 bit. And that is on a good day.