tanθ = 191/(4*5280)
note that for small angles (in radians)
tanθ ≈ θ
Find the angle of depression from the top of
a lighthouse 191 feet above the water level to
the water line of a ship 4 miles offshore.
1 answer
a lighthouse 191 feet above the water level to
the water line of a ship 4 miles offshore.
1 answer