An airplane flies at airspeed (relative to the

Question

air) of 410 km/h . The pilot wishes to fly due
North (relative to the ground) but there is a
51 km/h wind blowing Southwest (direction
225◦
).
In what direction should the pilot head the
plane (measured clockwise from North)?

Answer 1

draw a vector diagram, and then use the law of sines to find the desired angle.