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New Casio CWs: antilogs and scientific notation
04-05-2023, 07:58 PM
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New Casio CWs: antilogs and scientific notation
Conspicuously absent from the keyboard of Casio's new CW calculators (such as the fx-991CW) are the common and natural antilogarithms. These machines are possibly the only scientific calculators I have ever seen without these functions on their keyboards.

Are the missing antilog functions available in the CATALOG menu, or are they completely absent from the calculator? (If they are in the catalog, how many key presses are required to reach them there?)

I'm guessing that Casio's idea is for one to calculate these functions explicitly? For example, does one enter e^1.23 as [SHIFT][8](e)[^][1][.][2][3][=] and 10^1.23 as [1][0][^][1][.][2][3][=]?

That's only one more keystroke in each case than using the (shifted) antilog functions on the fx-991EX keyboard. One more keystroke isn't in itself the end of the world -- except that entering the functions this way breaks one's train of thought, forcing one to think in terms of exponents when all one really wants is an inverse log.

Interestingly, on Page 33 of the CW manual[1], where it discusses entering numbers in scientific/exponential/standard notation using what it calls the "Power of 10" key, it says "Pressing the [×10^] key is the same as pressing [×][1][0][^]". Can someone with one of these calculators confirm that this surprising statement is true? [On earlier Casio calculators, providing a non-integer exponent to [×10^] is an error.]

It would certainly be an interesting twist if calculating a natural antilog on the CW requires one more keypress than on the EX (eight rather than seven in the example above), but a common antilog can be done with one fewer (six rather than seven).

Notes:
1. Casio fx-570CW and fx-991CW User's Guide https://www.casio.com/content/dam/casio/...1CW_EN.pdf
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New Casio CWs: antilogs and scientific notation - nlj - 04-05-2023 07:58 PM



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