Question about Texas Instruments TI-30XA Calculator

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Natural logarithm with TI-30XA calculator

How do I key in to get natural log for the following problem
1n[1.000/1.0333] =

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I noticed that this calculator doesn't have a natural logarithm function as well. You can can always use the fact that
ln x = (log x) /log e or since log e is approximately .43429482
ln x = (log x)/.43429482. The greatest solution and it might be worth the 15 bucks or so to get a calculator with e^x and the natural logarithm function.

Posted on Mar 09, 2009


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Change log base

The TI-30XA calculates logarithms to base e and base 10. You can calculate the log of x to any base b by calculating the logarithm of x and dividing it by the logarithm of b: log(x)/log(b) or ln(x)/ln(b).

Nov 29, 2013 | Texas Instruments TI-30XA Calculator

2 Answers

How to fix error mesage on TI-30Xa. Every time I press LOG an error sign comes up. how do i fix this?

To take the log of a number, enter the number then press the LOG button, then the =. To take the log of a negative number, enter the negative number using the +/- key just to the right of the decimal point. To calculate the negative of a log, calculate the log and then negate it using +/-. To calculate the antilog (inverse logarithm), press 2nd then LOG.

Bear in mind that LOG is the common (base-10) logarithm. For the natural (base-e) logarithm, use the LN key to its right.

Nov 07, 2011 | Texas Instruments TI-30XA Calculator

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How do I work the anti log on TI-30X 2s? Where are the buttons?

What you call the antilog is also known as as the power function. More specifically, the inverse of a decimal log is the function 10 to a power, (10^x) It shares the same physical key as the log function. If the calculator has a key marked [LOG] you have to press the [2nd or SHIFT] key followed by the [LOG] key to activate the anti-log.

For natural log (logarithms in base e) the antilog is the exponential function (e^x). It shares the same physical key as the [LN] function.

May 09, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

How do i find the exponential root using the TI-30Xa calculator?

Using logarithms. For example, if A ^ X = 2; then X = logA(2);
This calculator only works in base-10 logarithms or natural logarithms, you should use the base conversion formula.
logA(X) = logC(X) / logC(A).
Good luck!

May 02, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

How do you do logarithmic problems on the TI-30X?

Use the LOG key for common logarithms, the LN key for natural logarithms. Use the SHIFT of those keys for antilogarithms.

Example: to calculate the natural log of 2, press LN 2 =

Sep 16, 2010 | Texas Instruments TI 30XIIS Scientific...

1 Answer

How do I calculate antilog using a TI-30XA?

For common antilogarithm use 2nd [10^x]. For natural antilogarithm use 2nd [e^x]. Those are the shifted functions of the two logarithm keys.

These two functions operate on the expression already entered into the calculator.

Example: to calculate the natural antilogarithm of .7:
. 7 2nd [e^x] =

Sep 16, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

Is there a log button? if not is there another way

Yes, there is a [LOG] key to calculate decimal logarithms (logs in base 10) it is marked LOG, and another key marked [LN] to calculate the natural logarithms (logs in base e).
You enter a positive number, then press the appropriate log key (LOG or LN) and the result will be displayed.

Jul 25, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

How do I find naperian logarithms?

Use the key marked LN (for natural logarithm (or Naperian logarithm)). It takes the log of the number currently in the display.

Feb 26, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

Using the correct key combination to determine inverse log

Sorry to contradict you but there are many types of logarithms, the most important ones are
  1. the common logarithms (log in base 10),
  2. the natural logarithms (logarithms in base e)
  3. the binary logarithms (logarithms in base 2)
On calculators, the common logarithms are labeled [LOG], and the natural logarithms are labeled [LN].

The inverse function of the natural log function is the exponential (e^(x)), and the inverse of the log in base ten function is the function ten to the power of. It is called (sometimes) the antilog

Question What is the antilog of 3.5678?
Answer The antilog of 3.5678 is 10^(3.5678) = 3696.579068
Verification: log(3696.57908) =3.5678

Hope it helps.

Nov 29, 2009 | Texas Instruments TI-30XA Calculator

1 Answer

How do i calculate the log of a number?

To calculate the natural log of a number use [LN] key. You enter it as
number [LN] [=] exemple 15.32 [LN] [=] gives 2.729150164
To clculate the log base 10 (common logarithm) you use the [LOG] key
15.32 [LOG][=] gives 1.185258765.

Hope it helps

Sep 17, 2009 | Texas Instruments TI-30XA Calculator

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