User manual HP 38G

[. . . ] Changing the battery 20 21 4 1. Keyboard General keys Key Functions Data entry Basic calculation Page 8 8 9 9 8 Key Functions Sexagesimal/decimal notation conversion Mode of angle DEGRADGRADDEG Page 13 13 13 11 9 9 9 9 15 0 to9:. +-* d= Reset the calculator and clear the memory Clear/clear error Change sign Angular conversion of data DEGRADGRADDEG Register exchange Clearing the last entered digit Fix the number of digits after the decimal point Floating notation Scientific notation Engineering notation Memory keys Key Functions Retrieve data from the independent memory Store display data in memory Exchange of display data and contents of memory Add displayed data to memory Page 11 11 11 11 r m Base-n keys Key Functions Decimal Binary Hexadecimal Octal Hexadecimal numbers only And Or Exclusive Or Exclusive Nor Not Negative Page 16 16 16 16 1618 17 17 17 17 17 18 Special keys Key Functions Inverse Mode Brackets (parentheses) Exponent Pi Page 7 7 10 8 13 I M () P A to F & o x X N Keyboard 5 Function keys Key s c t S T L ˬ Functions Sine Cosine Tangent Arc sine Arc cosine Arc tangent Hyperbolic Common logarithm Common antilogarithm Natural logarithm Natural antilogarithm Square root Square Fraction Cube root Reciprocal Factorial Page 13 13 13 13 13 13 14 14 14 14 14 14 14 12 14 12 14 Key % Functions Power Root Rectangle to polar Polar to rectangular Percent Page 8 14 15 15 12 Statistical keys Key n Functions Statistical data mode Data entry Data delete Sample standard deviation Population standard deviation Arithmetic mean Number of data Sum of value Sum of square value Page 19 19 19 19 19 19 19 19 19 6 Keyboard 2. 2345 HYP BIN OCT HEX Mantissa LCD Diagram The display shows input data, interim results and answers to calculations. [. . . ] 0. Clearing errors Press to clear an error (indicated by -E- in the display)eg, an overflow errorand retain data in the memory. Press to reset the calculator and clear the memory (solar model only). Fixing the number of decimal places displayed I 2 I . Press after your arithmetic operation, or after you press , to set the number of decimal places displayed (the number you press is the number of decimal places you want to display). The calculator rounds the number in the display but maintains full precision internally. Press to reset the floating decimal point. Setting the display to scientific notation I I Press to set the display to scientific notation and express the number as a power of 10eg, . 0043 is displayed as 4. 3. -03 to represent 4. 310-3. Press to reset the display to the floating format. Basic functions 9 4. Calculations Precision The HP 38G scientific calculator calculates answers to 12-digit accuracy, but rounds answers to 10 digits in the display. When it performs a calculation using the result of a previous calculation, it uses the stored 12-digit value and not the 10-digit value displayed. Order of operations The HP 38G scientific calculator performs operations in the following order: , , , *, d +, & o, x, X Simple calculations Perform calculations in the same way that you write them on paper. 7. 28. 5 4. 73. 9 7. 2*8. 5-4. 7*3. 9= 48 4*8= 42. 87 32. Specifying the order of calculations () Use brackets to specify the order of calculations. You can nest as many as six levels of brackets. You do not need to enter the closing brackets. The calculator inserts them for you, although it does not display them. Other functions Converting minutes and seconds to decimal format Press to convert minutes and seconds (sexagesimal figure) to decimal format. When you enter the sexagesimal figure, enter the degrees to the left of the decimal point, and minutes and seconds to the rightthe first and second digits to the left of decimal point are minutes and the third and subsequent digits seconds. I Press to convert decimal format to sexagesimal format. 142536 I 14. 2536 14. 42666667 142536 Conversion between angles, radians and grads I 45 = 0. 785398163 rad = 50 grad 45I I I RAD GRAD DEG 0. 785398163 50. 45. Trigonometric functions Press to switch between RAD, DEG and GRAD sin (/6 rad) = cos 635241 = RAD IPd6=s DEG 63. 5241 c tan (-35 grad) = GRAD 35t RAD 0. 5 63. 87805556 0. 440283084 DEG DEG GRAD-0. 612800788 2 sin 45 x cos 65 = DEG 2*45s*65c= cot 30 = 1/tan 30 = 1 sec (/3 rad) = cos (/3 rad) 1 cosec 30 = sin 30 cos tan - 2 DEG 0. 597672477 1. 732050808 2. 0. 760244597 31. 39989118 312359. 6 DEG 30t RAD IPd3=c 30s RAD 2Id2=c DEG RAD DEG 2 RAD DEG 10. 6104 = DEG . 6104IT I DEG Other functions 13 Hyperbolic functions sinh 3. 6 = tanh 2. 5 = cosh 1. 5 sinh 1. 5 = 3. 6s 2. 5t 1. 5crs= M M 18. 28545536 0. 986614298 2. 352409615 0. 22313016 sinh 1 30 = solve tanh 4x = 0. 88 1 x = tan 0. 88 = 4 30IS . 88ITd4= 4. 094622224 0. 343941914 Logarithmic functions log 1. 23 (=log10 1. 23) = solve 4x = 64 log 64 x = log4 log 456 In 456 = 100. 4 + 5 e . 3 = 5. 62. 3 = 123 /7 (= 123) = (78 23)-12 = 312 + e10 = 1 7 1. 23L 64Ld4L= 456Ldr= M 0. 089905111 3. 0. 434294481 . 4I+5*3I= 5. 62. 3= 123I7= (78-23)12= 312+10I= 2. 760821773 52. 58143837 1. 988647795 1. 305111829-21 553467. 4658 Powers and roots 2 + 3 x 5 = 3 2I+3I*5I= 5I+27I 123+30= 8I 5. 287196909 -1. 290024053 1023. (=1 x 2 x 3 x x 7 x 8 ) = 14 Other functions Miscellaneous functions 1. 234 + 1. 234 = I21. 234+ 1. 234= I. 123m x 456m = 56088m = 56. 088km 7. 8g 96 = 0. 08125g = 81. 25mg 123*456= I 7. 8d96= I 1. 23 2. 47 2. 468 0. 33 3. 33-01 6. 67-01 0. 67 0. 666666666 56088. 56. 088 03 0. 08125 81. 25 - 03 Polar to rectangular coordinates conversions Formula: x = r cos y = r sin eg, find the value of x and y when the point P is shown as =60 and the length r=2 in the polar coordinates DEG 2I60I I I 1. (x) 1. 732050808 (y) 1. (x) Rectangular to polar coordinates conversions Formula: r = x2 + y2 = tan-1y/x (-180< 180) eg, find the length r and the angle in radian when the point P is shown as x=1 and y=3 in the rectangular coordinates. RAD 1I3I= I I 2. (r) 1. 047197551 ( in radian) 2. (r) Other functions 15 6. Binary, octal and hexadecimal values M Use the M key to set the number base. When you use bases other than 10, you can only enter numbers valid for the baseeg, in binary mode you can only enter 1 and 0. [. . . ] You can amend the data entered into the calculator: To cancel the last entry you made, press before you press . Note that when you press , 0 is displayed. Press In to display the number of data elements stored in the calculator. To delete a data item you entered previously, enter the value again, then press I. Using statistical functions on your data In Once you enter a list of data values you can use the following statistical functions: In I I I I I The number of data elements entered Sample standard deviation Population standard deviation Arithmetic mean The sum of each data element The sum of the data elements squared Find the sample standard deviation of the data 5, 9 13 and 6. [. . . ]