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OpenStudy (anonymous):
From the foot of a building, I have to look upwards at an angle of 10 degrees to sight the top of a tree. From the fourteenth floor of the building, 50 metres above ground level, I have to look down at an angle of 60 degrees below the horizontal to sight the tree top. How high is the tree? How far from the building is this tree?
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OpenStudy (phi):
Here is a sketch |dw:1416677867019:dw|
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