A tower is situated on horizontal plane. From two points, the line joining these points passes through the base and which are a andb distance from the base. The angle of elevation of the top are
and
and
is that angle which two
points joining the line makes at the top, the height of tower
will be
Text Solution
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Let there are two points C and D on horizontal line passing from point B of the base of the tower AB . The distance of these points are b and a from B respectively i.e .,
and 
Line CD , on the top of tower A subtends an angle
, hence
According to question, on point C and D , the elevation of top are
and
.
and 
In
.........(i)
And in
.........(ii)
Multiplying equation (i) and (ii) 

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