1.

From a point E on the horizontal due to east of a tree, the top of the tree makes an angle of elevation 60^(@).From a point S on thehorizsontal due west of the tree the same top makes an angle of elevation 30^(@). The angle of elevation made by the top of the tree at the mid point of ES is

Answer»

`30^(@)`
`60^(@)`
`90^(@)`
`40^(@)`

ANSWER :B


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