Considering the diagram below, ABCD is a rectangle, find x, the angle of depression from point B to point C. The lengths of AC and BC are 3 and 5, respectively.

Round your answer to two decimal places.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: Considering the diagram below, ABCD is a rectangle, find x, the angle of depression from point B to point C. The lengths of AC and BC are 3 and 5, respectively.

Round your answer to two decimal places.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: Considering the diagram below, ABCD is a rectangle, find x, the angle of depression from point B to point C. The lengths of AC and BC are 3 and 5, respectively.

Round your answer to two decimal places.