Question about Texas Instruments TI-30XA Calculator

# How would I calculate -log(6.2 x 10^-8) on my TI- 30XA

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### kakima

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6 . 2 EE +- 8 LOG +- =

EE is the Enter Exponent key, just above the 7 key. +- is the Change Sign key, to the right of the decimal point key.

Posted on Oct 13, 2010

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## Related Questions:

### 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

### Change log base

The 30XA only calculates logs to base e (LN) and base 10 (LOG). However you can calculate the log of x to any base b simply by calculating log(x)/log(b) or ln(x)/ln(b)

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

### Hi, how do i calculate log^-1 on my ti-30xa? for example, in order to calculate log^-1(-2), what do i do? thank you.

The inverse of the common log function is the power function with base 10 (10^). It shares the same physical key as the log. You acees the function by pressing [2nd] [log]

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

### How do you find the log of 9.01 using TI 30xA calculator?

To calculate the common (base 10) log of 9.01, press 9 . 0 1 LOG =
To calculate the natural (base 3) log of 9.01, press 9 . 0 1 LN =

Both the LOG and LN keys are on the top row of the keyboard.

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

### Lost instruction on how to use ti-30xa calculator.how to do square root/percent/ratio/proprtion/roots/log

Here is the link to the calculator manual. It will show you how to do square root calculations, percentages, other roots, and logs. As to ratios and proportions you will have to read your mathematics textbook.

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

### I need to use a TI 30Xa to evaluate a Logarithm Log5 1/625 Not sure how to use the TI to do Log5

Use the relation log5(x) = log(x) / log(5) = ln(x) / ln(5)

LOG ( 1 / 625 ) / LOG 5 =

or

LN ( 1 / 625 ) / LN 5 =

Mar 11, 2010 | Texas Instruments TI-30XA Calculator

### Natural logarithm with 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.

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

### TI-30XA

Use the inverse log key sequences "2nd LN" or "2nd LOG" depending on whether you are using natural logs or logs to base 10

Dec 10, 2007 | Texas Instruments TI-30XA Calculator

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