A vertical pole subtends an angle Tan^-1...

A vertical pole subtends an angle `Tan^-1(1/2)` at a point P on the ground. IF the angles subtended by the upper half and the lower half of the pole at P are respectively `alpha and beta`, then `(tan alpha , tan beta)`=

`(1/4,1/5)`

`(1/5,2/9)`

`(2/9,1/4)`

`(1/4,2/9)`

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