Enter the two bearings:
Distance=km, Bearning=°
\(c^2 = a^2 + b^2 - 2ac\cos{(180+b-d)}\)
\(c = (40000.00)+(176400.00)-2.(200.00.420.00).cos(180+0.00-136.00)\)
\(c = 309.11 km\)
\(bearing = 109.29°\)