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As observed from the top of …

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As observed from the top of lighthouse 150 m high above sea level the angle of depression of a ship sailing directly towards it changes from 45° to 60° determine the distance travelled by the ship during the period of observations

    • Posted by Lavanya Garg 3 years, 6 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Kumkum D 3 years, 6 months ago

    Let the distance on angle of depression 45° be x And from 60° be y Then the distance travelled by the ship during the time of observations would be x-y Now, cot45°=x/150 1=x/150 x=150m And cot60°=y/150 1/√3=y/150 150/√3=y 50√3=y. {by rationalisation} So, x-y=150-50√3 =50(3-√3) m

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