Heights and Distances ( Part 5) Some Applications of Trigonometry | CBSE | Class 10 | Math

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$Q5. A 1.2 m tall girl spots a balloon moving with the wind in a horizontal line at a height of 88.2 m from the ground. The angle of elevation of the balloon from the eyes of the girl at any instant is 60°. After some time, the angle of elevation reduces t$

Q5. A 1.2 m tall girl spots a balloon moving with the wind in a horizontal line at a height of 88.2 m from the ground. The angle of elevation of the balloon from the eyes of the girl at any instant is 60°. After some time, the angle of elevation reduces t

Oct 22nd, 2020 11:03 AM

$Q4. The angle of elevation of a jet fighter from a point A on the ground is 60°. After a flight of 15 seconds , the angle of elevation changes to 30°. If the jet is flying at a speed of 720 km/hr, find the constant height at which the jet is flying.$

Q4. The angle of elevation of a jet fighter from a point A on the ground is 60°. After a flight of 15 seconds , the angle of elevation changes to 30°. If the jet is flying at a speed of 720 km/hr, find the constant height at which the jet is flying.

Oct 22nd, 2020 11:03 AM

$Q3. The angle of elevation of a jet plane from a point A on the ground is 60°. After a flight of 30 seconds, the angle of elevation changes to 30°. If the jet plane is flying at a constant height of 3600V3rn, Find the speed of the jet plane.$

Q3. The angle of elevation of a jet plane from a point A on the ground is 60°. After a flight of 30 seconds, the angle of elevation changes to 30°. If the jet plane is flying at a constant height of 3600V3rn, Find the speed of the jet plane.

Oct 22nd, 2020 11:02 AM

$Q2. From the top of a building 60 m high , the angles of depression of the top and bottom of a tower are observed to be 30° and 60°. Find the height of the tower.$

Q2. From the top of a building 60 m high , the angles of depression of the top and bottom of a tower are observed to be 30° and 60°. Find the height of the tower.

Oct 22nd, 2020 11:01 AM

$Q1. From a window( h metres high above the ground) of a house in a street, the angle of elevation and depression of the top and the foot of another house on the opposite side of the street are θ and (/) respectively. Show that the height of the opposite h$

Q1. From a window( h metres high above the ground) of a house in a street, the angle of elevation and depression of the top and the foot of another house on the opposite side of the street are θ and (/) respectively. Show that the height of the opposite h

Oct 22nd, 2020 11:01 AM

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