Calcuator forensics history question

[toml_12953]

(04-19-2021 08:01 AM)EdS2 Wrote:  Here's an OCR:

Quote:THE ACCURACY TEST : Before you buy a scientific check the accuracy with this simple test : 29 sin cos tan VX in ex x2 tan - cos - sin - 1 : ? The 29 is degrees , of course , since no machine will invert the trig functions on 29 radians. The SR - 52 of Texas Instruments gives this result : 29 . 00001537 . Various Hewlett - Packard machines return values around 29 . 00xxxx , inasmuch as they carry their calculations to only 10 significant digits . The CBM ad fails to state just what the result is on their machine ...

which tells us that the idea again comes from a Commodore advertisement. Aha - but in fact, in 1978, it is said to come from a UK advert!

The OCR is terrible! Here's a version you can figure out a little better:

Code:

In Degree mode:
29 sin cos tan √ ln e˟ x² tanˉ¹ cosˉ¹ sinˉ¹