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Casio fx-260 User Manual

Casio fx-260 User Manual

Scientific calculator
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fx-82SOLAR
fx-85B
fx-260SOLAR
fx-280
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Summary of Contents for Casio fx-260

  • Page 1 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...
  • Page 2 fx-82SOLAR/ fx-260SOLAR ENGLISH ESPAÑOL FRANÇAIS fx-85B/fx-280 DEUTSCH 110 ITALIANO...
  • Page 3: Table Of Contents

    CASIO ELECTRONICS CO., LTD. Unit 6, 1000 North Circular Road, London NW2 7JD, U.K. Contents Handling Precautions … 2 Modes … 3 Basic Calculations … 5 Constant Calculations … 6 Memory Calculations … 7 Fraction Calculations … 9 Percentage Calculations … 10 Scientific Function Calculations …...
  • Page 4: Handling Precautions

    • Avoid dropping your calculator and otherwise subjecting it to strong impact. • Do not store the calculator or leave it in areas exposed to high temperature or humidity, or large amounts of dust. When exposed to low temperatures, the calculator may require more time to display results and may even fail to operate.
  • Page 5: Modes

    fully reread this manual and ensure that the problem is not due to low battery power (fx-85B/fx-280) or operational error. • The contents of this manual are subject to change without notice. • No part of this manual may be reproduced in any form without the express written consent of the manufacturer.
  • Page 6 Note! • A mode guide is located at the top of the display screen. • DEG, RAD, and GRA modes can be used in combination with COMP and SD modes. • does not exit SD mode. • exits SD mode. •...
  • Page 7: Basic Calculations

    Basic Calculations • Use the COMP mode for basic calculations. • Example 1: 23 4.5 53 • Example 2: 56 ( 12)Ö( 2.5) • Example 3: 2Ö3 (1 10 • Example 4: 7 8 4 5=36 • Example 5: • Example 6: 2 [7 6 (5 4)] 122 •...
  • Page 8: Constant Calculations

    • Example 7: 4/3π5 - A x - Constant Calculations • Press make that number a constant. • “K” is on the display while a constant is being used. • Use the COMP mode for constant calculations. • Example 1: 2.3 3, then 2.3 6 (2.3 3) (2.3 6) •...
  • Page 9: Memory Calculations

    • Example 4: 1.7 (1.7 (1.7 (1.7 Memory Calculations • Use the COMP mode for memory calculations. • Use replaces current memory contents. • “M” appears when there is a value in memory. • To clear memory, press • Example 1: (53 6) (23 8) (56 2) (99Ö4) 210.75 (53 6) (23 8) (56 2)
  • Page 10 • Example 3: To calculate the following using memory and a constant: (12 3) (45 3) (78 3) 135. (12 3) (45 3) (78 3) (Memory recall) kAdditional fx-85B/fx-280 Memory Calculations • The fx-85B/fx-280 has two additional memories named A and B.
  • Page 11: Fraction Calculations

    • Example 2: To store the results of 123 Fraction Calculations • Use COMP mode for fraction calculations. • Total number of digits (including division marks) cannot exceed 10. • Example 1: • Example 2: 3 • Example 3: • Example 4: Fraction/decimal calculation result is always decimal.
  • Page 12: Percentage Calculations

    • Example 5: • Example 6: 1 Percentage Calculations • Use COMP mode for percentage calculations. • Example 1: To calculate 12% of 1500. • Example 2: To calculate what percentage of 880 is 660. • Example 3: To add 15% onto 2500. ↔...
  • Page 13: Scientific Function Calculations

    • Example 4: To discount 3500 by 25%. • Example 5: To calculate the following using a constant. 12% of 1200 = 144 18% of 1200 = 216 23% of 1200 = 276 (12%) (18%) (23%) Scientific Function Calculations • Use COMP mode for scientific function calculations. •...
  • Page 14 • Example 2: 1°2’3” + 4.56 = 5.594166667 • Example 3: sin 87°65’43.21” = 0.999447513 (DEG mode) • Example 4: 1.23↔ 1°13’48” • Example 5: 12°34’ ↔ 12.56666667 You can also use tween sexagesimal and decimal. kTrigonometric/Inverse Trigonometric Functions • Example 1: sin ( 4.56 43.21 I A O...
  • Page 15 • Example 2: cos 63°52’41” (DEG mode) • Example 3: tan ( 35gra)(GRA mode) • Example 4: cos • Example 5: To convert 45 degrees to radians, grads, and back to degrees. Repeated conversion between angle units can cause nor- mally minute error to accumulate, resulting in poor preci- sion.
  • Page 16 kHyperbolic/Inverse Hyperbolic Functions • Example 1: sinh 3.6 • Example 2: sinh kCommon and Natural Logarithms, Exponents • Example 1: log 1.23 • Example 2: In 90 ( log Iog 64 • Example 3: Iog 4 • Example 4: 10 •...
  • Page 17 • Example 8: log sin 40° + log cos 35° (DEG mode) S R + To convert to antilogarithm: • Example 9: 8 k Square Roots, Cube Roots, Squares, Reciprocals and Factorials • Example 1: 2 A L + • Example 2: A D + •...
  • Page 18 • Example 5: 8! kFIX, SCI, NORM, RND, RAN#, ENG Calculations • Example 1: 1.234 1.234, rounding result to two places (FIX 2). • Example 2: 1.234 1.234, rounding input to two places. F 7 2 • Press • Example 3: 1Ö 3 , displaying result with two significant digits (SCI 2).
  • Page 19 • Example 4: To convert 56,088 meters to kilometers. • Example 5: To convert 0.08125 grams to milligrams. • Example 6: To generate a random number between 0.000 and 0.999. Example (results differ each time) kCoordinate Conversion • Example 1: To convert polar coordinates (r 2, rectangular coordinates (x, y).
  • Page 20: Statistical Calculations (Sd Mode)

    θ kPermutation • Example: To determine how many different 4-digit values can be produced using the numbers 1 through 7. kCombination • Example: To determine how many different 4-member groups can be organized in a group of 10 individuals. Statistical Calculations (SD Mode) •...
  • Page 21 Input Data. Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of values Sum of squares of values • inputs the same data twice (as above). • You can also input multiple entries of the same data using .
  • Page 22 kMaking Corrections During Data Input • Example 1: To change data you have just input. Correct Actual • Example 2: To change data you previously input. Correct Actual 31 } — 20 — Correction Correction...
  • Page 23: Technical Information

    Technical Information kKeys and Their Functions • General Arithmetic calculations ... +, ,, -, ... \, = Backspace ... Q Clear(retains memory) ... k Number input ... 0 – 9, l Power on; All clear ... t Sign change ... E •...
  • Page 24 Memory B store ... A J 2 Memory M store ... A J 3 • Special Display/memory swap ... A N, Exponent ... e Internal rounding ... A b Parentheses ... O, P Pi (3.1415926536) ... A x Select mode ... F Sexagesimal ...
  • Page 25 Cube ... A N Cube root ... A D Engineering ... A J, Factorial ... A f Fraction ... C Fraction ... A B Hyperbolic ... M Natural antilogarithm ... A U Natural logarithm ... T Percent ... A v Polar-to-rectangular ...
  • Page 26: Kexponential Display Formats

    Sum of squares of values ... A a Sum of values ... A o kExponential Display Formats This calculator can display up to 10 digits. Larger values are automatically displayed using exponential notation. In the case of decimal value, you can select between two formats that determine at what point exponential notation is used.
  • Page 27: Kwhen You Have A Problem

    To switch between NORM 1 and NORM 2 Press . There is no indication on the display of which format is currently in effect, but you can determine the setting by performing the following calculation. • All of the examples in this manual show calculation results using the NORM 1 format.
  • Page 28 • In a series of calculations, press result is displayed to clear only the last calculation per- formed. • To change the operator key ( etc.) you just pressed, simply press the correct operator key. In this case, the operator of the last key you press is used, but the operation retains the order of precedence of the operation for the first key you pressed.
  • Page 29: Kpower Supply

    If this happens, move to an area with more light. • fx-85B/fx-280 This calculator is powered by the CASIO TWO- WAY POWER system, which makes it possible for the calculator to operate even in total darkness.
  • Page 30 Old batteries may leak, causing serious damage to the interior of the calculator. • The battery that comes with the calculator when you pur- chase it is for testing only. It may not provide full service life.
  • Page 31 5. Press to turn power on. kOrder of Operations and Levels Operations are performed in the following order of prec- edence. 1. Functions 2. x , R →P, P →R, nPr, nCr • Operations with the same precedence are performed from left to right, with operations enclosed in parentheses per- formed first.
  • Page 32 Ranges, and Conventions The following are the formulas, ranges, and conventions that are applied to various calculations that can be performed using this calculator. Coordinate Transformation • With polar coordinates, θ can be calculated within a range of –180°  θ...
  • Page 33 Permutation • Input range: n • Formula: nPr Combination • Input range: n • Formula: nCr Population Standard Deviation (xi – x) Sample Standard Deviation n – Arithmetic Mean 0 (n, r : integers) (n r)! 0 (n, r : integers) n!(n r)! –...
  • Page 34 Power Supply : fx-82SOLAR/fx-260SOLAR : Solar cell fx-85B/fx-280 : CASIO TWO-WAY POWER System: solar Battery Life (fx-85B/fx-280) : Input Ranges : Functions (DEG) x 9 10 sinx (RAD) x 5 10 cosx (GRA) x 1 10 tanx –1 –1 x ...
  • Page 35 Functions x  1 tanh –1 logx/lnx –1 –1 x  1 x  2.154434690 x  1 x  1 n 1 10 nPr/nCr (n and r are integers) R→P (DEG) P→R (RAD) (GRA) Input and Results Total of hour, minutes, and seconds digits must be 10 or fewer (including separator °’...
  • Page 36 Functions x Œ 0: –1 10 x  0: y However: –1 10 x Œ 0:y ≠ 0 –1 10 x  0: y However: –1 10 Total of integer, numerator, and denominator must be 10 digits or less(including division marks).
  • Page 37 Operating Temperature: 0°C–40°C (32°F–104°F) Dimensions: fx-82SOLAR/fx-260SOLAR: 8(H)i66.5(W)i125(D) mm 5/16"(H)i2-5/8"(W)i4-15/16"(D) fx-85B/fx-280: 13.5(H)i73(W)i144.5(D) mm 1/2"(H)i2-7/8"(W)i5-5/8"(D) Weight: fx-82SOLAR/fx-260SOLAR: 47 g (1.7oz) fx-85B/fx-280: 67 g (2.4oz) including battery Calculation Capacity: • Input/ Basic Calculations 10-digit mantissa; or 10-digit mantissa plus 2-digit expo- ±99 nent up to 10 —...
  • Page 38 CASIO COMPUTER CO., LTD. 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan SA9709-C Printed in China Imprimé en Chine...