Question

The top of a 15m. tail tower makes angle of depression of 60° with the bottom of an electronic pole & angle of elevation of 30° with the top of the pole.what is the length of electric dipole?​

Answer 1

Answer:

Then ∠ACB=60

0

,∠EDB=30

0

and AB=15 m

Let CD=h. Then BE=(AB−AE)

=(AB−CD)=(15−h)

We have

AC

AB

=tan60

0

=

3

⇒AC=

3

AB

=

3

15

And

DE

BE

=tan30

0

=

3

1

⇒DE=(BE×

3

) =

3

(15−h)

⇒3h=(45−15)

⇒h=10 m