20 Most Recent Casio FX-115ES Scientific Calculator - Page 8 Questions & Answers

Sorry but after I finished the post I noticed that the questuin is for the Casio FX0115ES while I decribed the calculator part for the TI84PLUS. However, the procedure is valid for any calculator that can generate a table from a given function. You should be able to implement it on the Casio. Just read the part that tells you how to create a table from a function: You should look at MODE TABLE

V=Pi*(r^2)*h
which gives h=V/(Pi*r^2)
Take this expression for h and substitute in the expression for the total surface. This gives (after simplifications)
S=2*Pi*r^2 +2*V/r

Open the table setup editor (Read your manual for the Casio)

Press [2nd][WINDOW] to access the Tabble setup
Set table start =2
Set DeltaTbl=0.05 (You can take a smaller value if you want)
Set Indepnt to Auto
Set Depend to Auto
Press [2nd][QUIT] to return to main calculator screen

Open the [Y=] editor
Enter the expression for the surface above as Y1=, using X as variable Y1= 2*Pi*X^2 +2*375/X
Press [2nd][GRAPH] to create the (table)

This part is not calculator-specific
Display the table and, scroll down examining the Y1 values.
Find the value of X (ie r) where the Y1 value is the smallest.
The value of X (r) you read to the left of of the minimum value of Y1 is in centimeters (because 375 mL= 375 cm^3)
The r-value that minimizes the surface should be around 3.90cm
Substitute this value for r in the expression for h above, calculate the value of h.

Press MODE 3 AC to enter the statistics mode. Press SHIFT STAT 7 to bring up the distribution menu then 1 to invoke P( .

Two alternatives:Press SHIFT MODE 6 then a digit greater than 2 to specify the desired number of digits to the right of the decimal point. For example, of you select 3 the number will be displayed rounded off to 0.004 .Press SHIFT MODE 9 2 to select the NORM2 mode.Be aware that in any mode if the magnitude of the number drops below 10^-9 then the calculator will automatically switch to scientific mode. The calculator can't display more than nine digits after the decimal point---the display just isn't big enough.

not much but if you enter trinometer into google you will get multiple web sites that do know

The inverse sine is defined only for numbers in the range [-1, +1].The sine of a number is at most 1.0. There is no number whose sine is 1.5, which is what you're asking for.The same applies to the cosine and inverse cosine.

standard deviation

calculate mean of a data set:

1. Turn calc. on or press MODE SeTUP
2.Press 3 for STAT
3. Press 1 for VAR
4.Enter values for X column
5. WHen done entering press SHIFT 1
6.Press 5
7.Press 2 to calculate the mean
8.Press =

The summation function only works in the real mode, not the complex mode. You'll find that the same limitation applies to many other functions, such as the integration.See page E-42 of this manual for the functions that are allowable in complex mode.

The key on the fx-155ES is marked "x10^x" and is located just to the right of the decimal point key.For your first example, press 1 2 7 x10^x 3 + 2 3 7 x 10^x 3 =For your second example, 1 2 3 x10^x (-) 3 - 2 3 0 x10^x (-) 6 =The "(-)" key is located just above the "RCL" key.

turn it on hit shift, then hit mode, press # 2:LineIO, your there.to make sure, enter a # hit the fraction button under CALC. enter another #hit=

For common logs (logs in base 10) use the 10^x function : Press [SHIFT] [Log] to access it.
For natural logs, use the exponential function. Press [SHIFT][ln] to access it.

Look for the key that has the template of a fraction : A solid white rectangle, a fraction bar an an empty rectangle. That key should be between the CALC key and the change sign key (-).If you press SHIFT followed by the fraction template key the calculator displays the template of a mixed fraction. In the rectangles type in the integer part, the numerator and the denominator. Use the arrow keys to move from one rectangle to the next.

Your calculator does not have graphing capabilities. On a graphing calculator you would first select the graph type 1. function y= f(x), 2. parametric x=x(t), y=y(t), 3.polar r=function(theta).

Hello,
Press [MODE] and select [1:COMP]
Press [SHIFT][MODE] and select [3:Deg]. You can also use rad if the angle you are given is in radians.
To start the conversion
Press [SHIFT][-] (Rec) screen displays Rec(
Key in the radius r , ex: 3 screen displays Rec(3
Press [SHIFT][)] (,) to enter comma separator Rec(3,
Key in the angle in degrees, ex: 57.3; screen displays Rec(3,57.3
Press ) to close parentheses; screen displays Rec(3, 57.3)
Press [=]
Screen displays
Rec(3, 57.3)
X=1.620720961
Y=2.524532346

X and Y are the values of the coordinates.

If angle is in radians, [SHIFT] [MODE][4:Rad] the command
Rec(3, Pi) gives X=-3, Y=0

I just realized that your question pertains to the FX82MS but is listed under the FX115ES (That is quite a difference) So my answer above does not concern you but I will leave it as is should anyone need the answer for the FX115ES.

Look at the enclosed screen capture for the FX82MS

Press SHIFT [SETUP] 1 to select the MthIO mode.

Not all calculators have that. The Fx115ES and the FX991 ES have a lot more options thatn the FX300Es and FX350ES. I believe you only have COMP (general computational mode), Table and STAT.
Why? It was not designed that way.

Your calculator knows only the decimal logarithms log or log_10 and the natural logarithms (ln or log in base e).
So you cannot compute directly the logarithms in any bases other than 10 and e.
A workaround consists in using the relation
log in base b of a number a (log_b (a))
log_b(a)= (log_10(a) ) / (log_10 (b))
or the relation
log_b(a)= ln(a)/ln(b)

log_2(0.3)=log(0.3)/log(2) where log is log in base 10
Similarly
log_2(0.3)=ln(0.3)/ln(2)
As to the multiplicative factor you had at the beginning of your expression, just multiply the value obtained by one on the formulas above (both formulas will give the same result) by 0.3