How to Use Log on a TI-83

By Kristy Wedel

The TI-83 is a graphing calculator created by Texas Instruments, also known as TI. TI invented the first handheld calculator in 1967. The TI-83 was introduced in 1996. The "LOG" button on a TI-83 is for logarithms, which reverse the process of exponentiation. The "LOG" button on a TI-83 uses log base 10. To enter the log of a different base, you will need to use the change of base property: logb(x) is the same as log(x)/log(b).

Press the "LOG" button, enter the number you want to take the log of and press the ")" key.

Press the "÷" key.

Press the "LOG" button and then enter the number of the base and ")".

Press the "ENTER" key.

About the Author

I have a bachelor’s degree in mathematics from OSU and have written numerous articles on mathematics for eHow. I also have over 5 years experience in computer software/hardware troubleshooting. I have written many software troubleshooting documents as well as user guides for software packages such as MS Office and popular media software.