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Alex, If the slope makes an angle of 10o with the horizontal and the tower is vertical then the tower makes an angle of 80o with the ground. In the triangle PQR you know |PQ| = 450 ft, |QR| = 110 ft and the measure of angle PQR is 80o. The Law of Cosines will then give you |RP|. Harley | ||||||||||||
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