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If `A_(1), A_(2), ……A_(n)` are the vertices of a regular polygon with 'n' sides and O is its centre then `sum_(i=1)^(n-1) bar(OA_(i)) xx bar(OA)_(i+1)=…`

A

`(n-1)(bar(OA_(1)) xx bar(OA_(2))`

B

`(n+1)(bar(OA_(1)) xx bar(OA_(2)))`

C

`n(bar(OA_(1)) xx bar(OA_(2)))`

D

`bar(OA_(1)) xx bar(OA_(2))`

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The correct Answer is:
A
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AAKASH SERIES-APPENDICES (REVISION EXERCISE)-CROSS PRODUCT OF TWO VECTORS
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