posted by Hunter .
A roller coaster moves 200 ft horizontally and then rises 135 ft at an angle of 30 degrees above the horizontal. Next, it travels 135 ft at an angle of 40 degrees below the horizontal. Find the roller coasters displacement from its starting point to the end of this movement. Answer = 421 ft at 3 degrees below the horizontal. Please show work on how to solve for this thank you.