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The angle of elevation of the top of a b...

The angle of elevation of the top of a building from the foot of the tower is `30^(@)` and the angle of elevation of the top of the tower from the foot of the building is `60^(@)`. If the tower is 30m high, find the height of the building.

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BEYOND PUBLICATION-APPLICATIONS OF TRIGNOMETRY-EXERCISE
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  17. The length of the shadow of a tower on the plane ground is sqrt(3) tim...

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