A ladder leans against a wall inside a spaceship. From the point of view of a person on the ship, the base of the ladder is 2.20 m from the wall, and the top of the ladder is 6.22 m above the floor. The spaceship moves past the Earth with a speed of 0.90c in a direction parallel to the floor of the ship. Find the angle the ladder makes with the floor, as seen by an observer on Earth.
Already asked once, given the wrong answer. Please help.