# Archive for October, 2010

## IntMath Newsletter: vision, wealth and slopes

1. Math application: 20/20 vision and trigonometry
2. Math application: Statistics and wealth distribution
3. Math tip: The slope of the trigonometric curves
4. Friday math movies: Math education and cell animations
6. Final thought: Dealing with mistakes

## Explore the slope of the tan curve

You can investigate the slope of the tan curve using an interactive graph.

## Explore the slope of the cos curve

What is the value of the slope of the cosine curve? Use an interactive graph to investigate it.

## Explore the slope of the sin curve

Use an interactive graph to explore how the slope of sine x changes as x changes.

## Video: Arthur Benjamin’s formula for changing math education

What math topic is most useful for people in their "real life"?

## What does 20/20 vision mean?

We often hear the expression 20/20 vision. What do the 2 numbers mean?

## Friday math movie: David Bolinsky animates a cell

Our bodies truly are beautiful and amazing. David Bolinsky from Harvard University talks about changes in medical education in this TED video.

## Singapore wealth - mean and median?

When we have a distribution with a high mean but a low median, what does it look like?

## IntMath Newsletter: Unit circle, gmail, graphs

1. Math tip: unit circles
2. Why do people use gmail most on Saturdays?
3. Math tip: Implicit functions (I heart math)
4. Resource: Free math graph software
5. Friday math movie: Mandelbox Trip
6. Final thought - enthusiasm

## Free math graphing software

Here is a short review of 2 free math graphing utilities, Winplot (Windows only) and Graphics Layout Engine (which is not so easy to use).

## Full archive

See the blog sitemap for all previous articles.