Problem Solving: An air traffic controller is sighting a helicopter on a control station directly ahead ( see figure). The helicopter is flying 2 km above the sighting instrument at the rate of 230 kph. How fast 2 km must the sighting instrument be turning when the angle between the path of the helicopter and the line of sight is 35°? Fove 66 Helopter Pying Towads te Contl Stie

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