Question

a 60m high building is erected vertically on a hillside. An electric post stands vertically on the hill. An observer at the top of the building, find the angle of depressions of the top and the bottom of the electric post to be 30 degrees and 42 degrees, respectively. If the hill makes an angle of 20 degrees with the horizontal, how high is the electric post?

Answer 1

pls help. :(

Answer 2

i think a drawn will be more ussefuly ...

Answer 3

first,draw diagram.

Answer 4

what does the angle of 20 degrees with the horizontal means?

Answer 5

Horizontal means its parallel to the base.

Answer 6

is that correct?

Answer 7

where is the 20 degree angle ?

Answer 8

im not sure where to put it

Answer 9

what line from your drawn mean the length of electric post ?

Answer 10

the 'h'

Answer 11

ok. so i made a translate by on programe and now understood it clearly