Скачать или смотреть PROBLEM SET 6 QUE 6 TO 10 ( TRIGONOMETRY ) CLASS 10 MATHS 2

PROBLEM SET 6 QUE 6 TO 10 ( TRIGONOMETRY ) CLASS 10 MATHS 2
0:00 6. A boy standing at a distance of 48 meters from a building observes the top of the
building and makes an angle of elevation of 30°.Find the height of the building.
2:52 7. From the top of the light house, an observer looks at a ship and finds the angle of
depression to be 30°.If the height of the light-house is 100 meters, then find how
far the ship is from the light-house.
5:28 8. Two buildings are in front of each other on a road of width 15 meters. From the
top of the first building, having a height of 12 meter, the angle of elevation of the
top of the second building is 30°.What is the height of the second building?
9:19 9. A ladder on the platform of a fire brigade van can be elevated at an angle of
70° to the maximum. The length of the ladder can be extended upto 20m. If the
platform is 2m above the ground, find the maximum height from the ground upto
which the ladder can reach. (sin 70° = 0.94)
13:47 10 «. While landing at an airport, a pilot made an angle of depression of 20°. Average
speed of the plane was 200 km/hr. The plane reached the ground after 54 seconds.
Find the height at which the plane was when it started landing. (sin 20° = 0.342)