Desmos Graphing Caluclator

Desmos Graphing Caluclator

Desmos is an education startup, currently with one major offering – an online graphing calculator. Graph any equation, cartesian or polar coordinates, exponential and trigonometric functions, and multiple equations at the same time. Using MathQuill (a what-you-see-is-what-you-get LaTeX editor for HTML5) and/or a built-in key pad users can easily enter and seamlessly edit any equation.

Users can also create a free account to save graphs and use a projector mode to display on in-class screens.

Desmos Graphing Calculator - On Screen Controls

A screen shot of the calculator in-browser, here you can see the on screen controls.

Aesthetics: 7
Entertainment: 2
Usability: 10

I am currently trying to rebuild my own mth skills after years of neglect, starting from precalculus on through multivariable calculus. My main tool for this has been Khan Academy, which has a great set of exercises arranged in a knowledge map, but a TERRIBLE calculator interface. I haven’t had a chance to play with the two simultaneously yet, but I strongly suspect that Desmos’s calculator is going to be a hugely useful tool for visualizing and manipulating complex functions.

Desmos Graphing Calculator Screen Shot 2

In this screen shot you can see the display options, including a projector mode that makes everything a little bolder for better display on class room projectors.

Additional awesomeness include the explorations, where users can explore graph-able functions ranging from different forms of linear equations, through derivatives; and the graph gallery, where users can peruse other users recently saved graphs.

Desmos Online Graphing Calculator - Trig. Functions Exploration

Here is one exploration, which graphs any/all of the trig functions. On the right some points of intersection have been selected showing their coordinates, on the left is the menu for selecting different explorations.