Archive for January, 2017

What’s the correct graph of sec(arccos(x))?

What is the graph of y = sec(arccos(x))?
Here we solve another graph mystery - what is the correct domain for y = sec(arccos(x))? And why do different software packages show similar, but different graphs?

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IntMath Newsletter: trig differentiation applet, art, music

In this Newsletter:

1. Differentiation applet - trigonometric functions
2. Math art
3. Resource: SimplexNumerica
4. Math movie: Music And Measure Theory
5. Math puzzles
6. Final thought: Challenges

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