Touch Mathematics is a collection of interactive mathematics visualizations.

### Featured topics

##### Derivatives – by Matthew Trost – June 2011

The concepts of tangents, slope, secants, limits, extrema and points of inflection interactively related to the first and second derivatives of a variety of basic functions.

**Try it!** Touch Derivatives »

##### Trigonometry – by Matthew Trost – May 2011

An interactive visualization of the six basic trigonometric functions: sine, cosine, tangent, cosecant, secant, cotangent.

**Try it!** Touch Trigonometry »