Question

Problem Solving: Airport X is 150 km east of airport Y. An aircraft is 240 km from airport Y, and 23 degrees north of due west from airport Y. How far is the airport X, to the nearest km?

Answer 1

here is what I understand from the problem:

Answer 2

using cosine law, I got XZ = 150^2 + 240^2 - 2(150)(240)cos23 degrees

Answer 3

but the answer is 383 km..

Answer 4

east is right...

Answer 5

yes..

Answer 6

\(\rightarrow\)

x should be on the right of y

Answer 7

so wait airport Y ----> airport X?

Answer 8

ohh.. okay.