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HP 48GII Algebraic and RPN Operating Modes
Calculation Modes
A simple example - the area of a piece of carpet
Setting the mode
Algebraic and RPN modes and the stack
The command line
Example – a more complicated expression
Example – which stepladder?
The Operating Mode
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Related Manuals for HP 48GI
Summary of Contents for HP 48GI
- Page 1 HP 48GII Algebraic and RPN Operating Modes Calculation Modes A simple example - the area of a piece of carpet Setting the mode Algebraic and RPN modes and the stack The command line Example – a more complicated expression Example –...
- Page 2 HP 48GII Algebraic and RPN Operating Modes Calculation Modes You can type calculations on the HP48GII, in “textbook” mode, in “algebraic” mode, or “RPN” mode. When you want to use a formula or an expression, you can type it the way it looks in a textbook. This is neat and is called “textbook”...
- Page 3 HP 48GII Algebraic and RPN Operating Modes Keys: First Second Third Fourth Fifth Sixth Seventh Eighth Ninth Algebraic Ü ™ In general, algebraic mode is better if you are using formulas you know, and if you just want to type them and get the results.
- Page 4 HP 48GII Algebraic and RPN Operating Modes Whichever way the calculator is used, it provides some very helpful tools. The first one is the Stack, where formulas and numbers you have already used are kept for future use.
- Page 5 HP 48GII Algebraic and RPN Operating Modes Figure 6 The HP48GII automatically put ANS(1) in front of the * when you pressed * with nothing before it. ANS(1) is now the number 1,212.40, the most recent answer. The number 70.00 is ANS(2). After you press ` it will become ANS(3).
- Page 6 HP 48GII Algebraic and RPN Operating Modes Tip! The most important stack commands in RPN are DUP, which copies the number in level 1 to level 2, and SWAP, which swaps the numbers in levels 1 and 2. DUP is done by pressing the ` key, as was described above. SWAP is needed in many cases, for example if you want to divide the number in level 1 by the number in level 2 then you must swap them before pressing the / key.
- Page 7 If you are willing to work out how to do the calculation, RPN saves you any confusion about brackets, and works with fewer keystrokes. If you are new to HP calculators, try using both modes and see if you prefer one or the other, or if you want to switch between them as you use the HP48GII.
- Page 8 HP 48GII Algebraic and RPN Operating Modes Actually, pressing Y would get the same result, and more quickly. Anyway, this is the sine of the angle between the ladder and the vertical. Or is it the cosine? Press „¼ and see the answer, 74.91 degrees. No, that is not right, it must be the arc cosine that you need.