Question 1091576

Hi
from a lighthouse 70m above sea level a ship 1.2km out to sea is observed. What is the angle of 
depression from the lighthouse to the ship.

thanks
<pre>1.2km = 1,200 m
Angle of DEPRESSION from lighthouse = angle of ELEVATION from ship
We then get: {{{highlight_green(matrix(1,7, tan (theta), "=", 70/"1,200", "=", tan^(- 1)(7/120), "=", 3.338^o))}}}