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A regular pentagons is inscribed in a ci...

A regular pentagons is inscribed in a circle. If `A_(1)` and `A_(2)` represents the area of circle and that of regular pentagon respectively, then `A_(1) : A_(2)` is

A

`pi/5 cos (2pi)/5`

B

`(2pi)/5 sin(2pi)/5`

C

`(2pi)/5 " cosec "(2pi)/5`

D

`(2pi)/5 cos (2pi)/5`

Text Solution

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The correct Answer is:
C
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