bearing from where? Oh, you must mean heeding.
Oh, and you need to fill in he wind speed. Say it is w. Then you need a resutant speed of 210 mi/hr due north.
Draw the diagram.
So, if the plane's speed is v, then
v^2 = 120^2 + w^2 - 2*120w cos 138°
Then the heading is nθW where sinθ/w = v/sin138°
Find the bearing and airspeed for a plane to fly 630 miles due north in 3 hours if the wind is blowing from a direction of 318* and is blowing
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