Question

A guard in a 20m tall watchtower spots a vehicle at an angle of depression oi 25

How far horizontally from the tower is the vehicle, to one decimal place? (​

Answer 1

Solution given:

height[p]=20m

angle of depression [a]=25°

base[b]=?

we have

Tan a=p/b

tan 25=20/b

b=20/tan25

b=42.89 or 43

the tower is 43m far from the vehicle .