Problem+12

The wind is blowing at 30 km/s towards the north west, making an angle 20° with the northward direction. What is the actual "ground speed" of the airplane, and what is the angle A between the airplane's actual path and the eastward direction?
 * 1) An airplane is flying at 170 km/s towards the north-east, in a direction making an angle of 52° with the eastward direction.