Eliminte ?, 1) if x=3 sec ? + 4 tan ? and y=4 sec ?- 3 tan ?. 2) the angles of dipression of the top and bottom of 8 meter tall building from the top of multistoried building are 30° and 45° respectively.find the height of multistoried building and the distance between two buildings (?3=1.73)

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