Archive for June, 2011

How to reflect a graph through the x-axis, y-axis or Origin?

What does reflecting a graph through the x-axis mean?A reader asks how to graph f(-x) and -f(x), and what does it mean?

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Newsletter: Trig intro, exact values sine, puzzle, mobile

What is trigonometry all about? Finding exact values for the sine of all angles,
Teacher resource: Teachnology, math movies, Doing things right

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Friday math movie: Math Prodigy Terence Tao, UCLA

Terence Tao - math prodigyTerence Tao is quite remarkable, having joined UCLA as a professor at age 20.

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How do you find exact values for the sine of all angles?

exact value sin of all anglesCan you find exact values for the sines of all angles? This guest post from reader James Parent shows how.

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Math movie: First Life with David Attenborough - Oldest Animals

First Life FractalSome of the earliest animals to appear used efficient fractal (or modular) shapes.

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What is trigonometry all about?

Introduction to trigonometryA reader is going to take a trigonometry class soon and asks what it's about.

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IntMath Newsletter: Graph plotter, visual math

In this Newsletter:

1. Summer math brain drain
2. Resource - Graph plotter using JSXGraph
3. Poll results and new poll
4. Visual design for math teachers
5. Friday math movies
6. Resource - Teachers’ Domain
7. Final thought – ambitions

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Friday math movie: Bach Crab Canon

Bach's Crab CanonHere's a very neat way to illustrate Bach's Crab Canon - using a Mobius strip.

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Online graph plotter using JSXGraph

Draw your own graph with this online graphing calculator.This is a handy and user-friendly graph plotter which works in all major browsers and operating systems.

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Full archive

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