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The angle of elevation of a jet plane from a point A on the ground is 60 ∘. After a flight of 15 second, the angle of elevation changes to 30 ∘. If the jet plane is flying at a constant height of 1500 √ 2 m.Find the speed of the jet plane.
The angle of elevation of the top of a building from the foot of the tower is 30 ∘ and the angle of elevation of the top of the tower from the foot of the building is 60 ∘. If the tower is 50 m high, find the height of the building.
The angle of elevation of a cloud from point h meters above the surface of a lake is b and angle of depression of its angle in lake is a.Prove that the height of the cloud above the lake is = h (t a n α + t a n β) t a n β − t a n α
If the angle of elevation of a cloud from a point h metres above a lake be θ and the angle of depression of its reflection in the lake be ϕ, prove that the distance of the cloud from the point of observation is 2 h cos ϕ sin (ϕ − θ) Also find the horizontal distance of the cloud from the place of observation.
If the angle of elevation of a cloud from a point 60 m above a lake is 30 and the angle of depression of its reflection in the lake be 60 .find the height of the cloud from the surface of the lake.
The angle of elevation θ of the top of a light-house as seen by a person on the ground is such that tan θ = 5 12. When the person moves a distance 240 m towards the light-house, the angle of elevation become ϕ such that tan ϕ = 3 4, Find the height of the light house. 225 m; 265 m; 286 m; 298 m
It is given that angles of elevation of the plane in two positions E and D are a point A are 60 o and 30 o respectively. ∠ E A B = 60 o, ∠ D A B = 30 o. It is also given that E B = 3000 √ 3 m. In Δ A B E, tan 60 o = B E A B. √ 3 1 = 3000 √ 3 A B. A B = 3000 m. In Δ A C D, tan 30 o = D C A C. 1 √ 3 = 3000 √ 3 A C. A C = 9000 m ...
The angle of elevation θ of a vertical tower from a point on the ground is such that its tangent is (5 12).On walking 192 metres towards the tower in the same straight line, the tangent of the angle of elevation Φ is found to be (3 4).
The angle of elevation of the sun is: View Solution. Q3. If the shadow of a tower is equal to its height, ...
The angle of elevation of the top of a tower from a point A on the ground is 30. On moving a distance of 20 metres towards the foot of the tower to a point B the angle of elevation increases to 60. Find the height of the tower and the distance of the tower from thy. point A.
