From the top of a 20 m high building, the angle of depression of a car on the ground is 45°. Find the horizontal distance of the car from the foot of the building.
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Question

From the top of a 20 m high building, the angle of depression of a car on the ground is 45°. Find the horizontal distance of the car from the foot of the building.

G1 Physics · Accepted Answer

Angle of depression equals the angle of elevation from the car, so the angle at the car is 45°. tan45°=20/x=1, hence x=20 m.