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 Discussion: All Tools in Trigonometry on Computer Topic: Using Sketchpad to illustrate coterminal angles

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 Subject: RE: Using Sketchpad to illustrate coterminal angles Author: LFS Date: Mar 11 2008
Hiya!
Sorry - I don't use GSP but this may help:

Here is a parametric function that winds backwards 5 and forward 5.
Curve[(1 + t / z) cos(t * 2 * pi), (1 + t / z) sin(t * 2 * pi), t, -5, 5]
If you set z=10 you can "see" the spiral.
If you set z=100 you can just use the endpoint (change the range) as the
terminal point.

In GeoGebra (freeware), this didn't give the visual effect I wanted  - so I used
different colored circles:
see: http://mathcasts.org/mtwiki/GlossaryT/AnglesCoterminal

Probably this won't help you, but I had fun doing it :)
Many regards.

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