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1. In a right triangle with an acute angle?, if cot ?-7/3, find sin?. Leave the answer as a fraction in exact form - do not round and draw a diagram.

2. What is the arc length of a sector a circle with a central angle of π/7 radians and a radius of 12 inches? Round answer, 2 de. Places.

3. The city of Pittsburgh, Pennsylvania, is directly north of of West Palm Beach, Florida. Pittsburg is at 40° 18´ north latitude, while West Palm Beach is at 26° 24´ north latitude. Assuming the Earth has a radius of 3960 mi, how far apart are these cities?.

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