Hp 42S User Manual

An alternative HP-42S/Free42 Manual(Version 0.6)2005Author: José Lauro Strapasson, [email protected]://joselauro.com/42s.pdf

LN and ▀ex: These functions calculate the base e=2.71828... logarithm and it's inverse. Unlike LOG these are very, ve

ABCDE FGHI JKLM NOPQ RSTUV WXYZ

3 MemoryThe real HP-42S has about 7200 bytes of memory while Free42 can have much more depending onthe available memory in the computer/handheld.In fa

Actually is not just PI you type but NOPQ P FGHI I but we wrote that for simplicity.Now to get this number back it is just type RCL “PI”. When you typ

3.3 The ▀ CUSTOM menuThis is not related to memory but as we saw the FCN function in the CATALOG menu we arealready able to talk about it.The HP-42S c

4 ProbabilityProbability functions are in ▀ PROB menu (over x key).They are COMB, PERM, N!, GAM, RAN and SEED.COMB: This calculates the number of comb

For a integer number we have Γ(n)=(n-1)! and Γ(n+1)=n!. The number in gamma function must bereal.In this point HP-42S is different from 33S which has

5 Complex Numbers5.1 Complex numbers in rectangular coordinates.Unlike the HP-33S (and its ancestor HP-32SII) complex numbers are straight supported a

6 ProgrammingProgramming in HP-42 is very simple. It does not use RPL style of HP-48 or HP-49. You programin the same way you use the calculator and u

RCL 00 x ÷So what about if you have to solve more 100 of this kind of equation? Only changing the a, b and cvalues? It would be better to save al

IndexIndex1 Introduction2 Basic Operations3 Memory4 Probability5 Complex numbers 6 Programming 7 Using the Solver 8 Numeric Integration 9 Statist

1 STO 005 +/- STO 014 STO 02Now we just press R/S (to run the program) and we get 1, and pressing it again we have 4.6.2 More than one program in the

When in programing mode XEQ function is programed and when the program finds the XEQfunction it changes to the given program which must finish with RT

works normally and if not the program jumps one line. The X?Y functions work in the same waybut now the condition is about the lines x and y of the st

7 Using the SolverUnfortunately the HP-42S does not have an equation editor like the 33S one. To use the solver andnumeric integration we must enter t

15 +16 ENDWhen we leave the program mode and go to Solver menu again we select FX program and what weare going to see isA B C XNow just enter the valu

8 Numeric IntegrationSuppose we want to solve numerically a integral of the form ∫abf xdxwe write the function in the same way we did in the solver

9 StatisticsTo enter statistical data we use the function Σ+. For one variable statistic just enter the number andpress Σ+. For two variables statisti

Let's start from MODL which is a “sub-sub-menu”. It has LINF, LOG, EXPF, PWRF and BEST.If the LINF is active the calculator will try to fit the d

10 MatricesDespite of its small display one of the nice features of HP-42S is the ability to work with matrices.This is done using basically the ▀ MAT

Exercise: Calculate the determinant of this matrix: First line: 1 2 3 Second line: -2 3 5 Third line: 0 4 -1Sol

1 IntroductionSince HP-42S was a very nice calculator, and its official manual is no longer freely available andthere were many people looking for its

you enter the real part then you enter the imaginary part and then you press ▀ COMPLEX.As here it is not a normal sum but a matrix sum we have to ente

11 Other BasesTo work with other bases we must use the ▀ BASE menu (over the “4”). This menu has the following functions:A...F: Select hexadecimal mod

12 FlagsThe HP-42S has 100 flags from 00 to 99. A flag is a “binary memory” which works as an indicatorof calculator's status. A flag can be “set

An alternative HP-42S/Free42 Manual(Version 0.6)2005Author: José Lauro Strapasson, Brazil.LICENSEThis manual is available as is without any warranty.I

2 Basic Operations2.1 RPNHP-42S as most old HP calculators was a RPN calculator. RPN comes from “Reverse PolishNotation”. In RPN we first enter data a

So algebraic calculators are ambiguous because the many ways they work. RPN calculators aremore standard and so less ambiguous.The main key to underst

IMPORTANT: For sake of simplicity sometimes we will use / instead of ÷.2.5 MenusNot all functions of HP-42S are visible above the keys. It has menus w

1.41421356237As you can see the numbers are not truncated but rounded. Not all numbers can be seem with a fixed decimal precision. If you put 4 digits

make the calculator to use ',' for decimal point and by pressing RDX. we make it use '.' for decimalpoint. Again the active mode i

this case the content just entered appears only once.So if you do 2 1/x or another example 9 √x what you will have will bei) Only the content of the l