How to type log10 on a TI83plus.fr?

FFFred Posted messages 4 Registration date   Status Membre Last intervention   -  
FFFred Posted messages 4 Registration date   Status Membre Last intervention   -
Hello,

Can someone tell me how to type log10 on a TI83plus.fr?
I was given an answer to calculate the decrease in sound pressure level
from a speaker with the increase in distance (20 * log10 of the distance) but I don't know how to do the calculation on my TI.

Thank you in advance for your help.

2 réponses

ElementW Posted messages 5690 Status Contributeur 1 293
 
'Howdy, logarithms have several names on calculators, including your TI-83:
- the natural logarithm (base e), named ln
- the logarithm base 10, named log10 or simply log, that's what you're looking for (its key is above ln)
- logarithms of other bases can be calculated using the formula
ln(number)/ln(base)

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from human import idiocy
del idiocy
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