How to Use Log on a TI-83

You can solve a log problem with a TI-83 or a slide rule.
••• Brand X Pictures/Brand X Pictures/Getty Images

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.


    • To find log10 (x), press the “LOG” button, type the number you want to take “)” and then “ENTER.” Use the “LN” button in the same manner to take the natural log.

Related Articles

How to Divide Using Logarithms
How to Enter a Subscript on the TI-83
How to Convert Pounds Per Square Foot to PSI
Differences of Sodium Hydroxide Vs. Sodium Carbonate
What is the Identity Property of Multiplication?
Test Your Knowledge on Middle School Science
How to Divide Rational Numbers
How to Solve Logarithms With Different Bases
How to Cancel a Natural Log
How to Find a Z Score
How to Calculate Volume of a Circular Cylinder
How to Reset a TI89
How to Do Fractions on a TI-30X IIS
What Color Would a Tester PH Paper Turn if Is Dipped...
How to Divide Using Logarithms
How to Evaluate Logarithms With Square Root Bases
How to Find the Perimeter of a Trapezoid With a Missing...
How to Calculate the Normality of HCL
How to Make a Simple Circuit
How to Neutralize an Acid