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From the top of a 100m high building the angle of depression of a car on the road is 30 degree's. Then find the distance of car from the building.

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by thanvi

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by thanvi

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and C be the car the distance between the car and the foot of the building

α=30°, AB=100 m

tan α=AB/BC

⇒tan 30°=1/√3=AB/BC

⇒100/BC=1/√3

⇒BC=100√3=

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