A research vessel detects an object on the sea floor that i…

 A research vessel detects an object on the sea floor that is 6500 feet diagonally from the vessel.  The angle of depression between the water surface and the object is .  How deep (vertical depth) is the object?  Round your answer to 2 decimal places. Show your diagram, equation(s) and work on the paper you will submit at the end of the test. The depth of the object is feet.