A joint search and rescue effort has been carried out by the United States and Puerto Rico to find a missing ship in the Bermuda Triangle area. The missing ship was last heard at location A as indicated in the map. A rescue ship noted the ship was 78 miles north and 90 miles east from its current position (indicated by point O in the map). For ease of navigating the ship, the captain requested the navigation officer to give the position in terms of the polar coordinates.

Convert the coordinates of the final destination from the Cartesian coordinates to polar coordinates.

• Set the current position of the rescue ship as the origin.