Trigonometry- word problem

Question

From the top of a 174 ft lighthouse the angle of depression to a ship in the ocean is 21 degrees. How far is the ship from the base of the lighthouse?

distance=?feet

Answer 1

lighthouse on the right, ship on the left...

angle at the ship must be 69 degrees

then tan 69 = 174/x

x = 174/ tan 69

= 66.792342096162348499032023009969