1. The problem statement, all variables and given/known data John move 8m 20 degrees north of the west. After, he moves another time 6 m 80 degrees south of the east. Calculate the difference between the two vector of his movement in cartesian form. 2. Relevant equations Vector =ai +bj 3. The attempt at a solution By using trigonometry, I found the following triangles : (-7.51, 2.74, 8) (1.035, -5.91, 6) So : D=(1.035i-5.91j)-(-7.51i+2.74j) D=8.545i-8.65j I don't know why it isn't workng. I know that my answer isn't good. But I know that my steps are good.