Calculators

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(This will work for all equations that start with Y=)

Press Y=. You will see a list on the side that looks like

\Y1=

\Y2=

and so on. If you want to graph y = 2x +3 for example, type 2x+3 after \Y1=. It should look like \Y1 = 2x+3. Press graph. If you cannot see the line, press ZOOM and choose option 6, ZStandard. If you graph a line that you still cannot see after you press ZStandard, try pressing ZOOM and choosing option 0, (the last one), ZoomFit.

If you get a DIM MISMATCH error or an INVALID DIM error, press Quit. Then press 2nd STAT PLOT (above Y=) and choose option 4, PlotsOff. Press ENTER until you see "Done". Then try again. If you get a SYNTAX error, then you made a mistake typing in your equation. Choose Goto and fix the error and then try again.

The zero function is used to find x-intercepts.

Graph an equation with an x-intercept. (In this example, x2-5).

Press 2ND CALC (above TRACE), and select option 2, "zero". The calculator will ask "Left Bound?". Move the flashing x-like shape to the left of the x-intercept that you want to find with the arrow keys and press ENTER. Then the calculator will ask "Right Bound?". Move the x-like shape to the right of the x-intercept and press ENTER. The calculator will then ask "Guess?". Move the flashing shape to a point close to the x-intercept and press ENTER. The calculator will give you the coordinates of the x-intercept.

Enter the number, then press the button marked with +/-

First of all, you have to have a scientific calculator, one that supports scientific notation. (As far as I know, all scientific calculators do.) The scientific calculator should have a special key labelled something like EXP. To input (for example) 2.3 million, you would type 2.3 EXP 6 (where EXP is short for "times 10 to the power...").

Go to the y= button at the top left corner, right below the screen. Then, type in "x^2" or type X, then use the X2 button.

Then, press Graph on the top right of the calculator. The y=x2 function is the most basic parabola.

Willim Seward Burroughs was the first to create a working calculator.

The answer is "you can count on me."

But of course, you do not "count" on a calculator: you calculate. You can count on your fingers, or on an abacus, or a handheld tally counter.

This most likely means that a stat plot is on, and that a list that the stat plot was using is blank. (If you get a DIM MISMATCH error, it probably means that the lists that the stat plot was using don't have the same number of values.)

If you are trying to graph the stat plot, go back and look at your data in the lists.

If you are not trying to graph a stat plot, then press 2ND STAT PLOT (above Y=) and select Plots Off. Press ENTER until you see "Done". Then try to graph again.

The sign change key on the TI-83 Plus calculator is located on the bottom row of keys to the left of the ENTER key.

It is a white key with black printing that looks like this: (-)

You must use this key instead of the blue subtraction key when you need to indicate a negative number; otherwise, the calculator will tell you it doesn't understand what you mean ("syntax error").

Calculators are used in chemistry to perform complicated mathematical operations and to achieve correct mathematical answers to complex problems. They are not used experimentally in the laboratory.

For example, to find the cube root of 5x5x5=125. In order to have the calculator show the cube root of 125, you need to enter the numbers in the following format. 125^(1/3) If you enter that in your TI-84 Plus exactly as its written above, it should come up with 5 as the answer. Notice the (1/3) at the end. This is the "cube." If you want to find the root of a number to, say, the 5th power you would use the following format in the example problem below. Example problem: 4x4x4x4x4=1024 Format for calculator: 1024^(1/5) Basically you put the number in front, followed by the carrot symbol ( ^ ) with the fraction (1/5), the 5 being the power of the number (the amount of times you multiplied 4 to get 1024). You have to put it in parenthesis and you have to put it as a fraction with the power as the denominator.

Finding the Mode and the Median are fairly easy and do not require the use of a calculator.

Consider this set of numbers as an example:
5, 7, 1, 1, 9, 8, 10, 8, 8


For #3, use this set:
5, 5, 7, 1, 1, 9, 8, 10, 8, 8


1.) Put ALL the numbers in sequential order. This is essential for finding the Median. It also helps depict what the Mode is.
(1, 1, 5, 7, 8, 8, 8, 9, 10)


2.) To find the Mode, choose the number that occurs the most. If there is more than one, then there is no mode, for there is always ONE mode.
In this case, it is 8.


3.) To find the Median quickly, count the number of numbers in your set. Add 1 to the amount of numbers in your set. Divide by 2. Then, count that many numbers into your set. If the previous quotient found has a ".5" in it, then you will have to find the average of the two numbers. (Note: This comes in handy for large number sets)
Example 1: (1, 1, 5, 7, 8, 8, 8, 9, 10) There are 9 numbers.
1/2(9 + 1) = 5 numbers in.

The median is 8.


Example 2: (1, 1, 5, 5, 7, 8, 8, 8, 9, 10)
1/2(10+1) = 5.5
The median is in between 7 and 8.
1/2(7+8) = 7.5


Keep in mind that you don't arbitrarily add .5 to the 5th number.
Example 3:
(10, 10, 40, 40, 40, 81, 82, 82, 95, 100)


1/2(40+81) = 60.5

the first video game

~student of THS

There is a formula, which uses Mersenne primes. If you don't know what that is, then you'll find it somewhere on the internet. The formula is this: 2n-1 x (2n-1) This will only work if the bit inside the bracket is a Mersenne prime. =)

The standard is a button that says "a b/c" the b/c is in a smaller font. When using it it should look like 3¬5 (meaning 3/5). You can also say 2¬3¬5 (meaning 2 and 3/5). To test try putting in 2¬6, it should simplify it to 1¬3. Unfortunately not all calculators have it.

Note: the actual symbol ¬ represents will be ¬ rotated 90 degrees clockwise.

Most scientific calculators come with a button that says SIN, or they have it under a secondary option usually accessed by pressing the SHIFT or 2ND first then the key sub labeled SIN.

It depends on what type of calculator

If you press "Mode" on your calculator, you can change from Sci, Eng, and something else.

Here is a fine Wire Size Calculator. Scroll down to related links and look at "Wire Size Calculator".

If you have a square root of a number, that means that your "square root" squared (multiplied by itself) will give you your original number. For example: * The square root of 4 is 2. * 2 x 2 is 4.

Click the y = button which is probably located in the top left corner. Type in the equation you wish to graph and press the graph button wich is located somewhere on the top right side.

From math class, some trigonometric identities:

cot x = 1/tan x

csc x = 1/sin x

sec x = 1/cos x

There are no built-in cot or csc formulas, so use the above.

Remember that these give errors when tan x, sin x, or cos x are equal to 0.

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