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General| Brand | HP |
|---|---|
| Model | Free42 |
| Category | Calculator |
| Language | English |
Explains Reverse Polish Notation (RPN) and its usage on the HP-42S calculator.
Describes how to adjust the calculator's display contrast.
Provides exercises to practice RPN calculations on the HP-42S.
Explains how to set a fixed number of decimal places for display.
Explains how to set the calculator to scientific notation display.
Details how to set the calculator to engineering notation display.
Explains the internal stack registers (X, Y, Z, T) used in RPN calculations.
Explains the reciprocal and square root keys.
Describes the base-10 logarithm and its inverse functions.
Introduces functions for program execution and branching.
Explains how to store values in memory registers and perform arithmetic operations.
Details storing values using alphabetic names instead of register numbers.
Lists all available functions, including hyperbolic and programming functions.
Lists variables containing real numbers, excluding numbered registers.
Introduces statistical functions for probability calculations.
Calculates the number of combinations of N things taken r at a time.
Explains how to represent and work with complex numbers in rectangular form.
Calculates the number of permutations of N things taken r at a time.
Details how to represent and use complex numbers in polar coordinates.
Introduces fundamental concepts and steps for writing programs on the HP-42S.
Covers how programs run, stop, and display results.
Explains how the GTO command is used to navigate between program spaces and labels.
Defines labels and how they are used with GTO and XEQ for program branching.
Demonstrates a simple "timer" program using conditional branching.
Shows a program to determine if a number is prime.
Demonstrates using the solver to find roots of quadratic equations.
Shows how to use the solver for the ideal gas law equation PV=nRT.
Explains how to input data for one-variable and two-variable statistics.
Lists and briefly describes available statistical functions like SUM, MEAN, SDEV.
Explains how to create a new matrix of a specified size.
Describes how to calculate the inverse of a matrix.
Details how to calculate the determinant of a matrix.
Explains how matrices can be used to solve systems of linear equations.
Explains the calculation of dot and cross products for vectors.
Covers functions for hexadecimal, decimal, octal, and binary modes.
Describes functions to set, clear, and test flags.
Explains the purpose of specific flags like audio, display grouping, and auto-off.
Maps calculator keys to a standard computer keyboard layout for Free42.
Details how to import and export programs to/from Free42.
Explains options for printing calculator output to text or graphics files.
Absolute value. Returns |x|.
Arc cosine. Returns cos¯¹ x.
Determinant. Returns the determinant of the matrix.
Go to label or branch to a specified label.
Turn the calculator off (programmable).
Round the number in the x-register.
Execute a function or program.
