Casio fx-3400P Scientific Calculator

Table of Contents

(Note: A table of contents is not generated as per instructions, but the document structure below follows the logical flow of a manual.)

1) General Description

1-1 Keys

Each key on this calculator has multiple functions assigned to it. You can activate a specific function by pressing other keys before the desired key or by setting a specific calculator mode. Detailed descriptions of key usage and functions are provided below.

ON Key (Power On)

Before starting calculations, press the ON key and ensure that the 'O' indicator is displayed. The ON key also deactivates the auto power-off function.

SHIFT Key (Key Shift)

Some keys have secondary functions indicated above or below them in brown text. To use these functions, press the SHIFT key first. The 'S' indicator will appear on the display. Then, press the key associated with the desired function. The 'S' indicator will disappear.

MODE Key (Mode Selection)

To select a desired calculator mode or angle unit, first press the MODE key, then press one of the following keys: EXP, 0, 1, or 9.

• MODE RUN [Calculation]: Performs manual calculations and program execution.
• MODE EXP: Displays the 'LRN' [Learning] indicator. This mode allows you to enter programs.
• MODE COMP [Calculation]: Performs standard arithmetic calculations and calculations using functions.
• MODE 1: Displays the 'BASE-N' [Number System] indicator. This mode performs binary/octal/decimal/hexadecimal calculations and conversions, as well as logical operations.
• MODE 2: Displays the 'LR' [Linear Regression] indicator. Used for regression analysis calculations.
• MODE 3: Displays the 'SD' [Standard Deviation] indicator. Used for standard deviation calculations.
• MODE 4: Displays the 'D' indicator. Sets degrees as the angle unit.
• MODE 5: Displays the 'R' indicator. Sets radians as the angle unit.
• MODE 6: Displays the 'G' indicator. Sets gradians as the angle unit.
• MODE 7: Press any digit key from 0 to 9 to specify the number of decimal places to display after the decimal point. The 'FIX' [Fixed] indicator will appear.
• MODE 8: Press any digit key from 1 (one significant digit) to 0 (ten significant digits) to specify the number of significant digits to display. The 'SCI' [Scientific] indicator will appear.
• MODE 9: Cancels settings made using MODE 7 and MODE 8.

General Keys

0-9 Keys (Data Entry)

To enter numerical values, press these keys in the desired sequence.

X, +, - Keys (Basic Arithmetic Operations)

Press these keys to perform addition, subtraction, multiplication, division, and to display results.

AC Key (All Clear)

The AC key clears all data except for values stored in the independent memory and constant memory registers.

C Key (Clear)

The C key clears incorrectly entered values (including exponential notation) and calculation results during mixed calculations. The calculation process itself is not cleared.

← Key (Backspace)

Press the ← key to move the cursor one position to the left.

+/- Key (Sign Change)

The +/- key changes the sign of a number from positive to negative or vice versa. If pressed after EXP, it changes the sign of the exponent.

Memory Operation Keys

MR Key (Recall Independent Memory Value)

Press the MR key to recall the contents of the independent memory. (Pressing MR does not erase the memory contents).

SHIFT Min Key (Store Value in Independent Memory)

Press SHIFT Min to store the value displayed on the screen into the independent memory register. The old value will be automatically erased and replaced by the new one.

M+, SHIFT M- Keys (Add/Subtract from Independent Memory)

Press M+ to add the displayed value to the value stored in the independent memory. Press SHIFT M- to subtract the displayed value from the value stored in the independent memory. These keys also allow you to add (or subtract) the result of any of the four basic arithmetic operations, xⁿ, and x¹/ⁿ to (or from) the value stored in the independent memory. The result of these operations is stored in the independent memory, overwriting the old value.

Kout Key (Recall Constant Memory Value)

Press Kout to recall a value stored in one of the six constant memory registers. For example, to recall the value from constant memory register 5, press Kout 5.

Kin Key (Store Value in Constant Memory)

Press Kin to store the displayed value into one of the six constant memory registers. For example, to store the value 12.3 into constant memory register 3, press 12.3 Kin 3.

Special Keys

( ) Keys (Input Parentheses)

This calculator performs calculations in the following order: 1) Functions; 2) xⁿ and x¹/ⁿ; 3) Multiplication and Division; 4) Addition and Subtraction. To change this order, use the ( ) keys to enclose the part of the formula you want to calculate first. Up to 18 sets of nested parentheses (6 levels deep) can be used in a single mathematical expression.

EXP Key (Exponent Input)

To enter a number in scientific notation, enter the mantissa, then press EXP, and then enter the exponent.

π Key (Pi)

Press the π key to display the value of π (the ratio of a circle's circumference to its diameter) - 3.141592654.

SHIFT d/c Keys (Sexagesimal/Decimal Conversion)

To convert a value from the sexagesimal system (base 60; degrees, minutes, seconds) to the decimal system (degrees), enter the degrees, press d/c, enter the minutes, press d/c, enter the seconds, and press d/c. To convert from the decimal system to the sexagesimal system, enter the degrees and press SHIFT d/c.

SHIFT X-Y Key (Register X-Y Exchange)

Press SHIFT X-Y to exchange the value displayed on the screen (contents of register X) with the contents of the working register (Y). Press SHIFT X-Y again to exchange them back. The previously displayed value will reappear.

SHIFT x-k Key (Register X-K Exchange)

Press SHIFT x-k to exchange the value displayed on the screen (contents of register X) with the contents of a constant memory register (K). Press SHIFT x-k again to exchange them back. The previously displayed value will reappear.

SHIFT RND Key (Internal Value Rounding)

Press these keys to round an internal value (stored in register Y) so that it matches the displayed value.

Keys for Inputting Values in Different Number Systems and Performing Conversions (Used only in BASE-N Mode)

DEC Key (Decimal Input)

In BASE-N mode, press DEC to enter decimal values or convert values from other number systems to decimal.

SHIFT BIN Key (Binary Input)

In BASE-N mode, press SHIFT BIN to enter binary values or convert values from other number systems to binary.

HEX Key (Hexadecimal Input)

In BASE-N mode, press HEX to enter hexadecimal values or convert values from other number systems to hexadecimal.

SHIFT OCT Key (Octal Input)

In BASE-N mode, press SHIFT OCT to enter octal values or convert values from other number systems to octal.

A-F Keys (Hexadecimal Input)

Input hexadecimal values from A to F.

AND Key (Logical AND Operation)

OR Key (Logical OR Operation)

XOR Key (Logical Exclusive OR Operation)

XNOR Key (Logical Exclusive NOR Operation)

NOT Key (Logical Negation Operation)

These keys are used for logical operations.

NEG Key (Negative Value Input)

Mathematical Function Keys

sin, cos, tan Keys (Sine, Cosine, Tangent Calculation)

Use the sin, cos, and tan keys to calculate trigonometric functions.

SHIFT sin⁻¹, SHIFT cos⁻¹, SHIFT tan⁻¹ Keys (Arc Sine, Arc Cosine, Arc Tangent Calculation)

To calculate the inverse trigonometric functions of the displayed value, press SHIFT sin⁻¹, SHIFT cos⁻¹, or SHIFT tan⁻¹.

hyp sin, hyp cos, hyp tan Keys (Hyperbolic Function Calculation)

Press hyp sin, hyp cos, or hyp tan to calculate hyperbolic functions of the displayed value.

SHIFT hyp sin⁻¹, SHIFT hyp cos⁻¹, SHIFT hyp tan⁻¹ Keys (Inverse Hyperbolic Function Calculation)

Press SHIFT hyp and then sin, cos, or tan to calculate the inverse hyperbolic function of the displayed value.

log, SHIFT 10ˣ Keys (Decimal Logarithm and Antilogarithm Calculation)

To calculate the decimal logarithm of the displayed value, press log. To calculate the decimal antilogarithm (10 raised to the power of the displayed value), press SHIFT 10ˣ.

ln, SHIFT eˣ Keys (Natural Logarithm and Antilogarithm Calculation)

To calculate the natural logarithm of the displayed value, press ln. To calculate the natural antilogarithm (e raised to the power of the displayed value), press SHIFT eˣ.

11-5 Square Root, Cube Root, Squaring, Reciprocals, Factorials

√ Key (Square Root)

Press the √ key to calculate the square root of the displayed value.

x² Key (Squaring)

Press the x² key to square the displayed value.

³√ Key (Cube Root)

Press the ³√ key to calculate the cube root of the displayed value.

1/x Key (Reciprocal)

Press the 1/x key to get the reciprocal of the displayed value.

x! Key (Factorial)

Press the x! key to calculate the factorial of the displayed value.

11-6 Other Functions (FIX, SCI, NORM, RND, RAN#, ENG)

FIX Key (Fixed Decimal Places)

Sets the number of decimal places to display.

SCI Key (Scientific Notation)

Sets the number of significant digits to display.

NORM Key (Display Type)

Selects normal or scientific notation display.

RND Key (Rounding)

Rounds the displayed value.

RAN# Key (Random Number)

Generates a random number.

ENG Key (Engineering Notation)

Displays numbers in engineering notation.

11-7 Polar to Rectangular Coordinate Conversion

To convert polar coordinates (r, θ) to rectangular coordinates (x, y), use the SHIFT P-R keys.

11-8 Rectangular to Polar Coordinate Conversion

To convert rectangular coordinates (x, y) to polar coordinates (r, θ), use the SHIFT R-P keys.

11-9 Permutations

Calculates permutations (nPr).

11-10 Combinations

Calculates combinations (nCr).

12) Statistical Calculations

Before performing statistical calculations, press SHIFT KAC.

12-1 Standard Deviation

Set the mode to 'SD' [Standard Deviation] by pressing MODE 3. Enter the data values using the DATA key. The calculator can then compute σn-1, σn, x̄, n, Σx, and Σx².

Standard Deviation (Sample)

Calculates the sample standard deviation (σn-1).

Standard Deviation (Population)

Calculates the population standard deviation (σn).

Arithmetic Mean

Calculates the arithmetic mean (x̄).

12-2 Regression Analysis

Set the mode to 'LR' [Linear Regression] by pressing MODE 2.

Linear Regression

Calculates the regression equation y = A + Bx, and finds coefficients A, B, correlation coefficient r, and estimated values (x, y).

Note:

Calculations for Σx², Σx, n, Σy², Σy, Σxy, x̄, ȳ, σn-1, σn, sx, sy, A, B, and r are performed by pressing the corresponding keys (1 through 9) after pressing Kout or SHIFT.

Correcting Entered Values

Examples show how to correct errors during data entry and calculation.

Logarithmic Regression

Formula: y = A + B⋅lnx. Requires entering values for x (lnx) and y, similar to linear regression.

Exponential Regression

Formula: y = A⋅e^Bx. Requires entering values for y (lny) and x, similar to linear regression.

Power Regression

Formula: y = A⋅x^B. Requires entering values for lnx and lny.

13) Programmable Calculations

This calculator can store programs containing up to 29 steps. Two separate programs can be stored. To enter a program, perform the desired calculation manually in 'LRN' [Learning] mode (MODE EXP). Then, enter the data and press RUN to execute the program.

How to Enter and Execute a Program

Example 1:

Calculate the surface area of regular octahedrons with edge lengths of 10, 7, and 15 cm.

Formula: S = 2√3 a²

Example 2:

Calculate the arc length (l) and chord length (a) of a sector with radius r and angle θ°.

Formula: l = (πrθ)/180, a = 2r sin(θ/2)

How to Delete a Program

To delete a program (P1 or P2), select the program number and press SHIFT PCL. To delete both programs, press MODE EXP SHIFT PCL.

Setting Calculation Modes within a Program

Programs can include calculations in BASE-N, SD, or LR modes. The calculation mode must be set within the program.

Transfer Commands

Commands like x>0 and x≤M allow for conditional program execution based on register X values.

Block Diagram

Illustrates program flow control.