Posted by Tricia on Tuesday, March 22, 2011 at 5:39pm.
from the top of a 250 ft lighthouse the angle of depression to a ship in the ocean is 18 degrees. how far is the ship from the base of the light house?

Pre Calc  Reiny, Tuesday, March 22, 2011 at 6:55pm
did you make a diagram?
tan 72° = x/250
x = 250tan 72°
= ....