Re: precision on all calcs


[Prev][Next][Index][Thread]

Re: precision on all calcs



I agree, but if we had an unaccurate calculation of sine, then, THEN
we might be somewhere.


>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
>=3D;)
>
>
>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/
>>
>> 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:   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
>>



---------------------------------------------------------
Get Your *Web-Based* Free Email at http://www.hotmail.com
---------------------------------------------------------


Follow-Ups: