Question

16.The angles of depression of the top and bottom of a 6m tall flag post from the top of a building are 45° ./ ° respectively. Find the height of the building.(√= 1.73)​

Answer 1

Answer:

In ΔAEC 

CEAE=tan45∘

AE=CE  -----  (i)

In ΔABD

BDAB=tan60∘

BDAE+EB=3

CEAE+7=3

AEAE+7=3   ---  from (i)

AE=3−17

So, height of the tower =AB 

=3−17+7

=27(3+3)m

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