1. The problem statement, all variables and given/known data A plane initially flies south at a velocity of 480 km/h. Aided by a wind, the groundspeed is 528 kmh at 15 degrees east of south. Calculate the windspeed and the direction of it 3. The attempt at a solution I got the magnitude of 139.9 km/h but for the angle I Don't know if the angle is down below the horizontal or above the horizontal.