For the whole file, see here

## Friday, May 23, 2014

### A sewing machine got me doodling...

Imagine what you could do if you only starting playing around with Geogebra!!

## Wednesday, May 21, 2014

## Friday, May 16, 2014

## Thursday, May 8, 2014

### What is mathematical about a boat?

Everything that was used to create the Geogebra file involves knowledge that should be gained by a high school trig student.

(I am assuming that in the age of technology the concept of "phase shift" has become an integral part of a trig course.)

I did use the built-in tangent line function, rather than go through the task of using calculus operations to find the same result.

For those who want to see how the tangent line is actually identified, make sure to pay attention in your Calculus class.

As long as the notion of tangent lines is on the table, I suggest you take a look at this (the original is here)

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