please analyze this question

wind Two airplanes fly between the same two cities. The destination city is due north of the origination, and both planes experience the same west-to-east crosswind, but travel at different airspeeds.Information y B A C = Ci + Cy j The three vectors shown are dimensionless (their lengths are pure numbers with no units). We know all of the following products hold for these vectors: B . B = C. C C. 1=0 A xC = C xB The vectors formed by the cross-products points in the +klos direction, and the angle del is restricted to the range 80