Question

An airplane takes the following route to reach the city C.
First it flies from the origin of the coordinate system to city A located 175 km in a direction 30

Answer 1

If the first vector is 175 km in a direction 30° S of E, the vector has the following components:

$$R_S=175\sin30°=87.5\text{ km},\\\space\\ R_E=175\cos30°=152\text{ km}.$$