The line drawn from the eye of an observer to the point in the object viewed by the observer is said to be
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The height or length of an object or the distance between two distant objects can be determined with the help of:
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If the angles of elevation of the top of a tower from two points at the distance of a m and b m from the base of tower and in the same straight line with it are complementary, then the height of the tower (in m) is
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If the length of the shadow of a tree is decreasing then the angle of elevation is:
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The angle of elevation of the top of a building from a point on the ground, which is 30 m away from the foot of the building, is 30°. The height of the building is:
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If the height of the building and distance from the building foot’s to a point is increased by 20%, then the angle of elevation on the top of the building:
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If a tower 6m high casts a shadow of $2\sqrt{3}$ m long on the ground, then the sun’s elevation is:
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The angle formed by the line of sight with the horizontal when the point is below the horizontal level is called:
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The angle formed by the line of sight with the horizontal when the point being viewed is above the horizontal level is called:
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From a point on the ground, which is 15 m away from the foot of the tower, the angle of elevation of the top of the tower is found to be 60°. The height of the tower (in m) standing straight is:
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