1. The problem statement, all variables and given/known data A light plane is traveling at 175km/h on a heading of N8°E in a 40km/h wind from N80°E. Determine the plane's ground velocity. 2. Relevant equations 3. The attempt at a solution After I did all the graphing and trig. I came out with x^2 = 175^2 + 40^2 - 2(175)(40)cos108 which ends up being roughly 191.18, but the answer tells me its 167 km/h, N5°W If anyone could help me out with this it would really be great, im having a rough time with it. Thanks for your time.