User manual CASIO FX-82SUPER

[. . . ] · Never dispose of battery (fx-85B/fx-280), the liquid crystal panel, or other components by burning them. · Before assuming malfunction of the unit, be sure to care--2-- 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. [. . . ] 1 2. = 2. 1 Fraction/decimal calculation result is always decimal. --9-- · Example 5: 1 0. 5(Fraction Decimal) 2 1C2= 1 2. 1 2 3. AB AB Percentage Calculations · Use COMP mode for percentage calculations. 1500 - 12 A v 180. · Example 2: To calculate what percentage of 880 is 660. 2500 - 15 A v + -- 10 -- 75. 2875. · Example 4: To discount 3500 by 25%. 3500 - 25 A v , 2625. · Example 5: To calculate the following using a constant. 12% of 1200 = 144 18% of 1200 = 216 23% of 1200 = 276 (12%) (18%) (23%) 1200 - - 12 A v 18 A v 23 A v K K K 144. 276. Scientific Function Calculations · Use COMP mode for scientific function calculations. · =3. 1415926536. kSexagesimal Functions · Example 1: 14°25'36" + 12°23'34" = 26°49'10" 14 I 25 I 36 I + 12 I 23 I 34 I = -- 11 -- 26°49°10. · Example 2: 1°2'3" + 4. 56 = 5. 594166667 1 I 2 I 3 I + 4. 56 = 5. 594166667 · Example 3: sin 87°65'43. 21" = 0. 999447513 (DEG mode) 87 I 65 I 43. 21 I S · Example 4: 1. 23 1°13'48" 1. 23 I 0. 999447513 1°13°48. 1. 23 1°13°48. I I · Example 5: 12°34' 12. 56666667 12 I 34 I A O 12. 56666667 You can also use I when inputting values to convert between sexagesimal and decimal. kTrigonometric/Inverse Trigonometric Functions · Example 1: sin ( 6 rad) (RAD mode) RAD Ax\6=S -- 12 -- 0. 5 · Example 2: cos 63°52'41" (DEG mode) 63 I 52 I 41 I W · Example 3: tan ( 35gra)(GRA mode) 35 E h ­0. 612800788 · Example 4: cos­1 ( 2 rad) (RAD mode) 2 RAD GRA DEG 0. 440283084 2A L\2=A V 0. 785398163 · Example 5: To convert 45 degrees to radians, grads, and back to degrees. F 4 45 DEG 45. RAD A F 5 0. 785398163 AF6 AF4 GRA 50. DEG 45. Repeated conversion between angle units can cause normally minute error to accumulate, resulting in poor precision. -- 13 -- kHyperbolic/Inverse Hyperbolic Functions · Example 1: sinh 3. 6 · Example 2: sinh 1 3. 6 M S 30 M A j 18. 28545536 4. 094622224 30 kCommon and Natural Logarithms, Exponents · Example 1: log 1. 23 · Example 2: In 90 ( loge 90) 1. 23 R 90 T 0. 089905111 4. 49980967 3. Iog 64 · Example 3: Iog 4 64 R \ 4 R = · Example 4: 100. 4 5 e 3 . 4 A Q + 5- 3E AU= · Example 5: 23 · Example 6: 2 3 2. 760821773 8. Or you can press k to clear the input entirely and start again. -- 25 -- · In a series of calculations, press k while an intermediate result is displayed to clear only the last calculation performed. · To change the operator key (+, , , -, \, w, As, 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. kOverflow or Error Check The following conditions make further calculation impossible. When a result (whether intermediate or final) or a t o t a l a c c u mu l a t e d i n m e m o r y i s g r e a t e r t h a n ±9. 999999999 1099. When function calculations are performed using a value that exceeds the input range. When an illogical operation (such as an attempt to calculate o and n while n 0) is performed during statistical calculations. When an illegal mathematical operation (such as division by zero) is performed. The total number of nested parentheses levels exceeds six, or when more than 18 pairs of parentheses are used. ("­ 1­" indicator appears on the display. ) · To clear any of the above conditions, press t and perform the calculation from the beginning. -- 26 -- · In the case of condition e, you could also press k. This clears the intermediate result just prior to the overflow, so you can continue with the calculation from that point. [. . . ] Install a new battery, making sure that the positive ( ) side is facing up (so you can see it). Press t to turn power on. kOrder of Operations and Levels Operations are performed in the following order of precedence. , · Operations with the same precedence are performed from left to right, with operations enclosed in parentheses performed first. If parentheses are nested, the operations enclosed in the innermost set of parentheses are performed first. [. . . ]