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The sum of the radii of inscribed and circumscribed circles for an n sided regular polygon of side a, is

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The sum of the radii of inscribed and circumscribed circles for an n sided regular polygon of side a, is 

(a) a cot (π/n)

(b) a/2 cot (π/2n)

(c) a cot (π/2n)

(d) a/4 cot (π/2n)

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1 Answer

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Best answer

The correct option is (b) a/2 cot (π/2n).

Explanation:

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