The angle of elevation of the top o...

The angle of elevation of the top of a building from the top and bottom of a tree are x and y repectively . If the height of the tree is h metre , then (in metre) the height of the building is

`(hcotx)/(cotx+coty)`

`(hcoty)/(cotx+coty)`

`(hcotx)/(cotx-coty)`

`(hcoty)/(cotx-coty)`

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LUCENT PUBLICATION-HEIGHT AND DISTANCE-EXERCISE-12A

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