How to find logs in base 10 on a TI-89?

1 Answer
Sep 13, 2014

There are 2 ways.

The math way is to understand how to convert bases:

#log a=(ln a)/(ln 10)#

The second way is to use the "CATALOG" button, "L", scroll down to "log" and press enter.

Here is an example of #log 50#:

#=(ln 50)/ln(10)#
#~~1.69897#