You are three miles north and two miles east of a cabin. On what bearing must you walk to reach the cabin?
How far are you from the cabin ?
You must go 3 miles south and 2 miles west
The tangent of the angle west of south will be
tan A = 2/3
so A = 33.7 degrees west of south
as a true compass heading that is 180 + 33.7 = 213.7 degrees true heading