04. Two horses, on opposite sides of a canal, are pulling a boat through the canal via a rope tied from the boat to each horse. One horse is pulling with a force of 1200 N at angle of 40.0° with the direction of the boat's travel. If the other horse pulls with a force of 1000 N, what must be the direction of his pull if the boat moves parallel to the two sides of the canal? See the diagram to the right.
