Created by StemPy LabA drone hovers over level ground, tied by a taut straight cable that makes with the ground. How long is the cable?
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← Imran, whose eyes are 1.3 m above the pavement, looks at the top of a building 23 m away along level ground and sees it 45° above his eye level. What is the height of the building?The foot of a tower cannot be reached, so the distance to it is unknown. Why is one angle of elevation not enough to find the height? →
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