A plane is steering at S83degreesE at an airspeed of 550 km/h. the wind is from N70degreesE at 85 km/h. Determine the ground velocity of plane to one decimal. Use the cosine and sine law.

Answer 1

the vectors to add are

v = (550cos7°,550sin7°)+(85cos20°,85sin20°)

so, plug in the numbers and get the sum. Then just get |v| and its direction