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The line of sight is the straight line d...

The line of sight is the straight line drawn from the eye of an observer to the point where the object is viewed by the observer.

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The angle of depression of the point viewed is the angle formed by the line of sight with the horizontal when the point being viewed is above the horizonatal level.

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Knowledge Check

  • Where we can observe mitosis

    A
    Nail base
    B
    Brain
    C
    Legs
    D
    Kidney

  • How does the surface of water appear to the eye of an observe inside water?

    A
    mirror with a circular hole
    B
    mirror with an elliptical hole
    C
    mirror without hole
    D
    mirror with a square hole

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    When the line of sight is below the horizontal level, the angle so formed by the line of sight with the horizontal is called the angle of__________

    A post stands on the top of a pillar 40ft high. The elevations of the tops of the pillar and the post are respectively 30^@ and 45^@ to an observer standing on the horizontal line from the foot of the pillar. Find the lenght of the post and the distance of the observer from the pillar.

    If the straight line intersects the circle at two points, then the straight line is called a "_____" to the circle.

    What is the line of sight communication?

    Find the equation of the straight line equidistant from the point (2,-2) and the line 3x-4y+1=0.

    A curve is such that the mid-point of the portion of the tangent intercepted between the point where the tangent is drawn and the point where the tangent meets the y-axis lies on the line y=x. If the curve passes through (1,0), then the curve is

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