Friday, 4 November 2011

Chords in polygons

souradeep bhattacharya:Chords in polygons

A regular polygon is inscribed in a unit circle and all the different length chords connecting pairs of vertices are drawn.
(a) 3 chords connecting 4 vertices (b) 4 chords connecting 5 vertices

What is the link between the number of sides of the polygon and the sum of the squares of the lengths of these chords?

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Define f:RR by \[f(x)= \begin{cases}(1-\cos x) \sin \left(\frac{1}{x}\right), & x \neq 0 \ 0, ...