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Find the sum of the radii of the circles...

Find the sum of the radii of the circles, which are respectively inscribed and circumscribed about the a regular polygon of n sides.

A

`(a)/(2)cot((pi)/(2n))`

B

`a cot ((pi)/(2n))`

C

`(a)/(4) cot((pi)/(2n))`

D

`a cot((pi)/(n))`

Text Solution

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The correct Answer is:
A
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