* Identity the following sets a finibe or enginib. o A : (x: 167 and 125} C B = {x: 2-5x+b = 0, XEN]
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airliner are 7.5 km from each other, at the same altitude. From the observation tower, the two aircraft are separated by an angle of 68 ° If the jet airliner is 5.2 km from the observation tower, ho w
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