Calculating Distances at Sea The navigator of a ship at sea spots two lighthouses that she knows to be 3 miles apart along a straight seashore. She determines that the angles formed between two line-of-sight observations of the lighthouses and the line from the ship directly to shore are 15" and 35". See the illustration. (a) How far is the ship from lighthouse P? (b) How far is the ship from lighthouse Q? (c) How far is the ship from shore? Write the equation using rectangular coordinates r = sinθ + 1