A car is initially driven east for a distance of 60 km, followed by a northward movement for 35 km. Finally, the car travels in a direction 30° east of north for an additional 55 km. Explore and analyze the displacement and overall direction of the car from its starting point. Include details on how vector addition is applied to determine the resultant displacement, considering both magnitude and direction. Discuss any relevant trigonometric principles involved in calculating the displacement vector resulting from these distinct movements.