Edit made on November 30, 2008 by GuestEditor at 12:48:47
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[[[> http://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Circle-trig6.svg/338px-Circle-trig6.svg.png ]]]
Trigonometry is, in theory, the study of triangles. The name itself
talks about "measuring" (metric) and triangles (trig).
However, it has now gone well beyond just triangles, and talks about
a great deal of geometry in general. In particular, /sin/ and /cos/
(and related functions) turn up everywhere in engineering and physics,
even though they are defined simply in terms of right-angled triangles.
[[[ http://upload.wikimedia.org/wikipedia/commons/7/7d/Sin_drawing_process.gif _ |>> Plotting the /sin/ function <<| ]]]
Images courtesy of the wikipedia commons.
Stay tuned ...