Originally Posted by
+TSRA
No doubt someone has some wicked cool math formula that will specifically tell you 274T is the correct track, and that can be used to back-up your mental image of the question and answer sets.
Challenge accepted..
θ = atan2( sin Δλ ⋅ cos φ2 , cos φ1 ⋅ sin φ2 − sin φ1 ⋅ cos φ2 ⋅ cos Δλ )
where:
θ is the initial bearing,
φ1 is the start point,
φ2 the end point,
Δλ is the difference in longitude
θ = atan2( sin (-10) ⋅ cos (56.03) , cos (56.02) ⋅ sin (56.03) − sin (56.02) ⋅ cos (56.03) ⋅ cos (-10) )
θ = atan2(-0.09702743761, 0.00721372431)
θ = -1.4965855976348807 radians which is -85.7480384 degrees
or (-85.7480384 + 360) = 274.25 degrees