Relating cos(x) to an isosceles triangle.
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Worksheets to accompany
The Fourier Transform and its Applications; Prof. Osgood, Stanford University:
[url]http://www.youtube.com/watch?v=gZNm7L96pfY[/url]
[list]
[*]Part I
1. Sine or cosine from two points: [url]http://www.geogebratube.org/material/show/id/49208[/url]
2. Unit Step, Unit Impulse: [url]http://www.geogebratube.org/material/show/id/49526[/url]
[b]→3. Triangle function λ[/b]
4. Sum λ1+ λ2 is a scalene triangle: [url]http://www.geogebratube.org/material/show/id/50004[/url]
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