20 Most Recent Casio FX82ES Scientific Calculator Questions & Answers

You cannot do matrices with this calculator. Use an FX991 ES, or FX115 ES.

Casio FX82ES... | Answered on Jul 09, 2019

Calculator cannot handle complex numbers.

Casio FX82ES... | Answered on May 22, 2018

To get the cotangent, you use cot(x)=1/tan(x).

Casio FX82ES... | Answered on Apr 08, 2018

You are confusing this calculator with one of its more sophisticated brothers (FX 115 ES Plus or FX991ES plus). The 82 ES plus has only three modes.

Casio FX82ES... | Answered on Dec 31, 2015

Press the [S<=>D] key to convert from fraction to decimal and back. Any information you need is in the manual.

Casio FX82ES... | Answered on Aug 14, 2014

I am afraid there is a misunderstanding. The sequence you describe changes the decimal marker from a dot to a comma. It does not insert a thousands separator.



Casio FX82ES... | Answered on May 16, 2014

You need to draw the curve y= x^2-4x+ 3. It is a parabola. The equality (=) is verified by all points on the curve. The curve divides the whole plane in two regions. In one region y will be less than x^2-4x+3. In the other regions y will be larger than x^2-4x+3
The regions are the interior of the parabola and its exterior. To find out the region where your inequality is verified you proceed as follow.
  1. Look at the graph and choose the coordinates of one point. Select integer values (BTW the point (0,0) is usually a good candidate) and write y ? x^2-4x+3 where the ? stands for the inequality sign you will have to insert to make the relation correct.
  2. Take x=0, and y=0 and substitute in y ? x^2-4x+3
  3. 0 ? (0^2)-4*(0)+3.
  4. Clearly the ? stands for < because 0 <3.
  5. So at all the points in the region where (0,0) is located the condition y< x^2-4x+3 is TRUE.
In the other region y < x^2-4x+3, is FALSE and that second region (the one that does not contain the origin (0,0) is the one you need to find. It represents your solution set. Note that the origin (0,0) does not lie in the solution set region



Casio FX82ES... | Answered on Mar 04, 2014

If you want to open it, just undo the screws on the back, there is no secret incantation that one can say to make thing easier than that.
Open it at your own risk.

Casio FX82ES... | Answered on Jan 29, 2014

All triangles have three sides.
There are two main formulas that do not call on trigonometric ratios.
The classic one:
  • 1. You need the length of a base and it corresponding height (the length of the segment perpendicular to that base and passing through the vertex (summit) opposite to that base. Area=(1/2) * (measure of the base)*(measure of the height). The base and height must be expressed in the same unit.
Heron's Formula if you have the length of the three sides. Let those measures be a, b, and c.
  • Calculate the semi-perimeter p with p=(1/2)(a+b+c)
  • Area=Square root of (p*(p-a)*(p-b)*(p-c))
  • a, b, and c must be expressed in the same unit.

Casio FX82ES... | Answered on Jan 18, 2014

Press [SHIFT][9] (CLR). Then select 3:All.
Everything will be reset to default.


To setup press [SHIFT][MODE](Setup) and change the
settings you want.

1: to use MathIO display mode; 2: to use the LineIO, 3: 4: 5: to change the angle unit. 6:Fix to set Fixed number of decimals, 7:SCI scientific notation display, 8: Norm for Normal display mode. (read your manual for that).
By pressing the Arrow Down button you get other setup choices.
1: to display mixed numbers, 2: for improper fractions, 3: Stat; 4: to chose the dot or the comma as a decimal marker. 5: to adjust contrast of the screen.


Casio FX82ES... | Answered on Jan 18, 2014

That covers a lot of possibilities. Sorry I can't help if you do not give details.

Casio FX82ES... | Answered on Jan 18, 2014

Find the formula for the correlation coefficient and use the calculator to calculate it.
You can also use the calculator to do statistics. It has some keys to retrieve the statistical values calculated. You will find r among them.
Please do read your manual to learn how to do statistics.

Casio FX82ES... | Answered on Jan 18, 2014

Do you have a question?
Find the prime factors of a natural number.
This calculator does not have a utility/feature that does that for you. However you can use it to help you carry out the sequence of divisions you have to do, while you keep count on how many times you divided by 2, by 3, by 5,7, etc.

Casio FX82ES... | Answered on Jan 18, 2014

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