Question

a flagstaff stands upon the top of building at a distance of 75m the angles of elevation of tops of the flax top and building are 45 degree and 35 degree find the height of the flagstaff​

Answer 1

Step-by-step explanation:

From the ΔABC,

tanθ=BCAB

tan45∘=75AB

AB=tan45×75=ans1

From the ΔDBC,

tanα=BCDB

tan35∘=75DB

DB=tan35×75=ans2

Now, the length of the flagstaff = AB - DB 

=ans1−ans2

=ans3

Therefore, the length of the flagstaff is ans3 m.

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