From an aeroplane vertically above a straight horizontal line, the angles of depression of
two consecutive kilometer stones on the
opposite side of the aeroplane are found to be
U and
(1) Find the distance of the aeroplane from
kilometer stone at an angle of depression
0 Find the distance of the aeroplane from
kilometer stone at an angle of depression
B
tin Show that the height of the aeroplane is
tan +tan B
(iv) Find the distance between two consecu-
tive kilometer stones
Write the formulae used in the solution