Ah, yea that's right. it's impossible to solve it.
Well, this equation is derived from somewhere else, and I might have done mistake in doing it.
This is the question:
Use Cartesian vector method to solve the problem. If you use any other method, you will receive zero.
A pilot wishes to fly form city A to city B, a distance of 720 km on a bearing of 70 degree. The speed of the plane is 700 km/h. An 60 km/h wind is blowing on a bearing of 110 degree. What heading should the pilot take to reach his or her destination? How long will the trip take?
Could you help me with this please? I will post my work in 5 minutes.