Question

An amateur astronomer sets up his telescope in

the center of a circular field. The field is
surrounded by trees 20 m tall. The tripod holding
the telescope pivots 1 m above the ground.

What is the lowest angle of elevation at which the astronomer can observe a star?

Answer 1

Lowest angle of elevation is 20.8

Explanation:

If he is in the middle of the field, then the 100 value is split in half.

Then, you do 20-1 because of the height of the telescope.

So now, to solve:

tanx= 19/50 (opposite over adjacent)

x= tan^-1 times (19/50)

19 devided by 50= 0.38

then do 0.38 tan^-1

and round.

Therefore the answer is 20.8