Question about Texas Instruments TI-30XA Calculator

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

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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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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

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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

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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

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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

1 Answer

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

1 Answer

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

1 Answer

How do i find the negative log on a TI-30Xa


Hi,

Ex: calculate -log(15.32)
  1. Calculate the log 15.32 [LOG] [=] result 1.185258765
  2. Then press the change sign key (-) result -1.185258765
You can also try 15.32 [LOG] (-) [=]. Try to veriufy it on your calculator.

Here is a picture of the change signd677d4e.jpg
Hope it helps

Dec 13, 2009 | Texas Instruments TI-30XA Calculator

1 Answer

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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