A telephone line hangs betweenn two poles at 12 m apart. In the shape of the catenary y = 50 cosh -45, where x and y are measured in meters. Find the 50 approximate value of the slope of this curve where it meets the right pole. a. 0.1203 b. 0.8962 c. 0.4888 d. 0.8079 e. 0.1389

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