Do you ever realize how useless trig was? A washer rolled off the roof of my dads rv.

So a washer the only one of its kind rolled off of the roof of my dads rv while he was working on one of the vents. No one saw where it fell nor what size it was. I did well in math and geometry but id say even given a 1 ft per second velocity and 2 degree downward slope.
Itll never be found.
Therefore why was i forced to learn trig? The replacement washer costs. 20 cents.