My teacher arrived at A(5.196, 3) and B(-2, -3.46). When I solved for vector B, I used rcos(0), rsin(0) and arrived at (-3.46, -2). Why was B flipped on my teachers example if cosine = x and sine = y? What made sine = x and cosine = y?

QUESTION 17 Vector A = 6.0 m and points 30 north of east. Vector B = 4.0 m and points 30' west of south. The resultant vector A + B is given by 2.7 m at an angle 8.30 east of south. O 2.3 m at an angle 8.3 south of east. 2.7 m at an angle 8.3 south of east. 3.2 m at an angle 8.3 south of east. O 3.2 m at an angle 8.3 east of south