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a communications satellite is directly above the extension of a line between receiving towers A and B. It is determined from radio signals that the
a communications satellite is directly above the extension of a line between receiving towers A and B. It is determined from radio signals that the angle of elevation from tower A is 88.9degrees and the angle of elevation from tower B is 87.5degrees. If A and B are 688km apart, how far is the satellite from A? (ignore the curvature of the earth.)
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