The angles of depression of the top and bottom of a building 50 meters
high as observed from the top of a tower are 30˚ and 60˚ respectively.
Find the height of the tower, and also the horizontal distance between the
building and the tower.
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the number of electrons gained loss or shared so as to complete the Oct 8 of electron is valence cell is called valency it has electronic configuration files for electron I shared with other atoms to complete the updates and so its valency is 4
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