Plotting Parametric Equations on the TI-83+ and TI-84+

We at Calcblog hope you had a great winter vacation! So far, we’ve posted tutorials on graphing in rectangular/Cartesian and polar coordinates, but there are other ways to specify functions. One of these is as a function of a parameter, …

Video: Using Variables on Your TI Graphing Calculator

We just posted our second video tutorial to YouTube! This tutorial covers the basic use of variables to help with calculations, a technique that will help you use your calculator more effectively and avoid making mistakes when entering quantities. We …

How to Enter Logarithms on Your Graphing Calculator

Most graphing and scientific calculators have the ability to calculate logarithms, but you might come across questions which require you to use a different base than your calculator’s built-in functions. Thankfully, there is a simple formula called the “change of …

Filed under Difficulty: Easy, TI-83 Plus, TI-84 Plus, TI-89, TI-92 Plus | 7 Comments

How to Graph Polar Equations on the TI-83+ and TI-84+

Polar coordinates are another way of representing a two-dimensional space, just like Cartesian (rectangular) coordinates. Instead of x and y, points are described using r, a radius, and θ (theta), the angle counterclockwise from the positive x axis. In this …

Filed under Algebra, Difficulty: Easy, TI-83 Plus, TI-84 Plus | 3 Comments

Algebra Series Index

We originally ran our series on Algebra skills from October 24-28, 2011, and received positive feedback from teachers and students on the content. To make this data easier to access, we’ve placed links to all the articles here—in one place …

SAT Calculator Strategies – SAT Test Prep #5

There are a lot of misconceptions about calculator use on the SAT. This article covers some basic strategies on how to use your calculator “smarter.” It also attempts to dispel some of the myths you’ve probably heard about calculators and …

How to Round Numbers on the TI-84 Plus and TI-89

Sometimes it’s useful to work in units with only a certain number of decimals. For example, if you’re doing money calculations, you probably don’t want to think about fractions of cents. If you want to change the number of decimals …

Algebra Mini-Series #5: Fraction Mistakes, Cross Multiplying, and Solving Rational Equations

This is the final installment of our weeklong series on improving your algebra skills. Our goal for this series was to provide a useful resource for both students and teachers, so that this article can be used in the classroom, …

Filed under Algebra, Difficulty: Easy | 2 Comments

Algebra Mini-Series #4: Use Multiplication in Equations Wisely

This is part four of our weeklong series on improving your algebra skills. Our goal for this series is to provide a useful resource for both students and teachers, so that this article can be used in the classroom, for …