Re: precision on all calcs
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Re: precision on all calcs
It wouldn't work anyway. It makes no sense conceptually. The sine of 1 degree gives the y coordinate of a point which represents the intersection of a unit cirlce and the origin. Multiplying this by 180, no matter how accurate the calculation of sine, will never yield pi.
-----Original Message-----
From: Scott Trimmer [SMTP:strimmer@RIFT.FOO.NET]
Sent: Friday, June 27, 1997 10:54 PM
To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: precision on all calcs
The reason the answer differs is because of the way the TI-92 does sin.
It doesn't do sin exactly. If it did, we could have pi exactly, and we
don't have it quite yet. If you are interested in pi to 1 million places,
search the internet for Project Gutenberg. Also, how did you know where
it differs? Is there some way you can determine that on the 92?
-Scott
=;)
On Sat, 21 Jun 1997, Jeff Tyrrill wrote:
> I just realized something. Even in degree mode, 180*sin(1) does not exactly
> equal pi. It differs in the ten-thousandth place, and if it were pi, the TI-92
> would give that as an answer, but it doesn't. Oh well. I'll bet changing to
> degree mode solves his problem anyway.
> ________________
>
> Jeff Tyrrill's TI Calculator Site: Contains programming tips, undocumented
> discoveries and tips for power users, and comparisons of the different
> calculator models.
> http://tyrrill-ticalc.home.ml.org/
>
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> more.
> http://ti-files.home.ml.org/
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>
> -----Original Message-----
> From: Jeff Tyrrill [SMTP:jeff_tyrrill@geocities.com]
> Sent: Saturday, June 21, 1997 4:51 PM
> To: CALC-TI@LISTS.PPP.TI.COM
> Subject: RE: precision on all calcs
>
> Change your calculator from the default radian mode to degree mode.
> ________________
>
> Jeff Tyrrill's TI Calculator Site: Contains programming tips, undocumented
> discoveries and tips for power users, and comparisons of the different
> calculator models.
> http://tyrrill-ticalc.home.ml.org/
>
> TI-Files member: The premiere TI site on the web, with reviews of games and
> more.
> http://ti-files.home.ml.org/
>
>
> -----Original Message-----
> From: Open discussion of TI Graphing Calculators On Behalf Of Boogeyman
> Sent: Saturday, June 21, 1997 1:12 PM
> To: CALC-TI@LISTS.PPP.TI.COM
> Subject: precision on all calcs
>
> When I make 180*sin1 on any of my calcs (80,82,92) I got something weird,
> but never pi. Does anybody know if it's the case with other calcs (I only
> go Ti's) ? (It also works with win calc, so I suppose somethin's wrong in
> all the OS.)
>
> TIA
>
> Boogeyman
>
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