Q22 of 35 Page 219

From the top of a building h metre high, the angle of depression of an object on the ground has measure θ. The distance (in metres) of the object from the foot of the building is


Let the distance of the object from the foot of the building be l.


From the figure we see that,




The distance of a point from the building l = h cot θ

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22

The angle of depression of a ship from the top of a tower 30 m height has measure 60. Then, the distance of the ship from the base of the tower is ………..

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When the length of the shadow of the pole is equal to the height of the pole, then the angle of elevation of the source of light has measure

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As observed from the top of the light house the angle of depression of the two ships P and Q anchored in the sea to the same side are found to have measure 35 and 50 respectively. Then from the light house....

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Two poles are x metres apart and the height of one is double than that of the other. If from the mid – point of the line joining their feet, an observer finds the angle of elevation of their tops to be complementary, then the height of the shorter pole is