Re: Problem in

Hi, me too -- have tried proscribed steps before, to no avail.
Regards, Charles

On 5/17/19 22:13, Javin Paul wrote:
> Hello All,
>
> I want to unsubscribe from this group, can anyone please guide? Sorry 
> for the trouble.
>
> Regards
> Javin
>
> On Fri, Apr 26, 2019 at 3:24 PM Max Lipsky <[email protected] 
> <mailto:[email protected]>> wrote:
>
>     Hello Tom!
>
>     I think is too much for roundoff error
>
>     Found funny post about it:
>     https://randomascii.wordpress.com/2014/10/09/intel-underestimates-error-bounds-by-1-3-quintillion/
>     http://notabs.org/fpuaccuracy/index.htm
>
>
>
>>     On 25 Apr 2019, at 19:56, Tom Lane <[email protected]
>>     <mailto:[email protected]>> wrote:
>>
>>     Max Lipsky <[email protected] <mailto:[email protected]>> writes:
>>>     SELECT acos(
>>>               cos(radians(48.9193))
>>>               * cos(radians(48.9193))
>>>               * cos(radians(2.5431) - radians(2.5431))
>>>               + sin(radians(48.9193))
>>>                 * sin(radians(48.9193))
>>>           ) as result;
>>
>>>     This returned [22003] ERROR: input is out of range
>>
>>     Not too surprising, because (at least on my machine)
>>
>>     regression=# select cos(radians(48.9193))
>>     regression-#            * cos(radians(48.9193)) +
>>      sin(radians(48.9193))
>>     regression-#              * sin(radians(48.9193));
>>          ?column?
>>     --------------------
>>     1.0000000000000002
>>     (1 row)
>>
>>     Problems of this sort are inevitable when working with
>>     finite-precision
>>     math.
>>
>>     https://en.wikipedia.org/wiki/Round-off_error
>>
>>     regards, tom lane
>
>
>
> -- 
> Thanks
> Javin
> http://javarevisited.blogspot.com/
> Twitter : https://twitter.com/javinpaul
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