Question

Calculate the lenght of the return journey from point c to point a when an aircraft flies from its base a 200km on a bearing of 162 degrees to point b,then flies 350km on a bearing of 160 degrees to point c,and then return directly to base a

Answer 1

planes fly on headings, not bearings.

Man, those two headings are almost the same. The distance will be very nearly 200+350.

However, using the law of cosines, the distance z is

z^2 = 200^2 + 350^2 - 2*200*350*cos178°