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AB is a vertical pole. The end A is on the level ground .C is the middle point of AB. P is a point on the level ground . The portion BC subtends an angles `beta` at P. If AP = nAB, then tan `beta`=

A

`n/(2n^2+1)`

B

`n/(n^2-1)`

C

`n/(n^2+1)`

D

none of these

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A
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