



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


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