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Trigonometric l...

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  • Question 1
    4 / -1

    An observer on the top of a tree, finds the angle of depression of a car moving the tree to be 30o. After 3 minutes this angle becomes 60o. After how much more time, the car will reach the tree

  • Question 2
    4 / -1

    A house of height 100 metres subtends a right angle at the windows of an opposite house. If the height of the window be 64 metre, then the distance between the two houses is

  • Question 3
    4 / -1

    The length of the shadow of a pole inclines at 10o to the vertical towards the sun is 2.05 metres, when the elevation of the sun is 38o. The length of the pole is

  • Question 4
    4 / -1

    AB is a vertical pole with B at the ground level and A at the top. A man finds that the angle of elevation of the point A from a certain point C on the ground is 60o. He moves away from the pole along the line BC to a point D such that CD = 7cm. From D the angle of elevation of the point A is 45o. Then the height of the pole is

  • Question 5
    4 / -1

    The horizontal distance between two towers is 60 metres and the angular depression of the top of the first tower as seen from the top of the second, is 30o. If the height of the second tower be 150 metres, then the height of the first tower is

  • Question 6
    4 / -1

    From the top of a light house 60 meters height with its base at the sea level, the angle of depression of a boat is 15o. The distance of the boat from the foot of light house is

  • Question 7
    4 / -1

    An observer in a boat finds that the angle of elevation of a tower standing on the top of a cliff is 60o and that of the top is cliff is 30o. If the height of the tower be 60 metres, then the height of the cliff is

  • Question 8
    4 / -1

    A tower subtends an angle α at a point A in the plane of its base and the angle of depression of the foot of the tower at a point l metres just above A is β. The height of the tower is

  • Question 9
    4 / -1

    The angle of elevation of a tower from s point A due south of it is 30o and from a point B due west of it is 45o. If the height of the tower be 100 m, then AB =

  • Question 10
    4 / -1

    A aeroplane flying horizontal 1 km above the ground is observed at an elevation of 60o and after 10 seconds the elevation is observed to be 30o. The uniform speed of the aeroplane is km/h is

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