Re: arcsin(arccos(arctan(tan(cos(sin(9))))))
- From: hagman <google@xxxxxxxxxxxxx>
- Date: Wed, 15 Aug 2007 00:59:39 -0700
On 15 Aug., 09:41, Guy Macon <http://www.guymacon.com/> wrote:
On the Calculator Forensics page,
[http://www.rskey.org/~mwsebastian/miscprj/forensics.htm]
the following formula is used to test calculators:
arcsin(arccos(arctan(tan(cos(sin(9))))))
I can switch calc.exe into degrees mode and thus conclude
that Windows is based on the Sunplus SPLB30A chipset :)
Alas, some calculators (including the one that you get when
you copy the above equation into Google) only calculate trig
functions in radians.
See [http://www.rskey.org/~mwsebastian/miscprj/radians.htm]
Does anyone have a better method for running the Calculator
Forensics test on a radians-only calculator?
Do the same research as Mike Sebastian did with many calculator
models and a different (e.g. radians only) function.
Or try the alternative he suggests (open the calculator and look
at the chip).
hagman
--
Guy Macon
<http://www.guymacon.com/>
.
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