Question about Texas Instruments TI-30XA Calculator

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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

It's for calculating the natural logarithm (logarithm base e).

Nov 17, 2013 | Texas Instruments TI-30XA Calculator

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.

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

The 30XA only has logarithm functions for base e and base 10. However, you can calculate the logarithm to any base by using the relationship logb x = log x / log b = ln x / ln b

To calculate log3 of 9, press

9 LOG / 3 LOG =

or

9 LN / 3 LN =

To calculate log3 of 9, press

9 LOG / 3 LOG =

or

9 LN / 3 LN =

Apr 03, 2011 | Texas Instruments TI-30XA Calculator

You can calculate the log to any base by using the relationship logb(x) = log(x)/log(b) = ln(x)/ln(b). In words, the base-b logarithm of x is the logarithm of x divided by the logarithm of b.

So, to calculate the log base 3 of 18, press

1 8 LOG / 3 LOG =

or

1 8 LN / 3 LN =

So, to calculate the log base 3 of 18, press

1 8 LOG / 3 LOG =

or

1 8 LN / 3 LN =

Mar 06, 2011 | Texas Instruments TI-30XA Calculator

The log function evaluates the logarithm of the expression in the display. To compute the negative log of 10x10^(-3), press 1 EE +/- 3 LOG +/- =

Nov 21, 2010 | Texas Instruments TI-30XA Calculator

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] =

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

If you're asking about entering powers of ten, use the EE (enter exponent) key just above the 7. If you're asking about exponentiation, use the y^x key just above the divide. If you're asking about antilogarithms, use the second shift of the appropriate logarithm key on the top row.

Jun 12, 2010 | Texas Instruments TI-30XA Calculator

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

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.

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.

Feb 20, 2009 | Texas Instruments TI-30XA Calculator

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