A plane flew 120km from aba to onitcha on bearing 200° and later flew 85km to awka on bearing 120°, find the distance of the plane from aba, bearing of the plane from aba solution:
Sketch triangle AOB where
A = aba
O = onitcha
B = awka
To find AB use the law of cosines
Use the law of sines to find angle B
Then you can figure the bearing of A from B.
Post your work if you get stuck.