Aroller coaster moves 199 ft horizontally, then rises 121 ft at an angle of 28.5° above the horizontal. it then travels 121 ft at an angle of 38.3° below the horizontal. what is the magnitude of its displacement from the starting point at the end of this movement (in what is the angle relative to the horizontal of this displacement? use positive values for angles above and negative values for angles below the horizontal (in