Me with this problem in the picture, its about trigonometry.

Step-by-step explanation:

The value of a vector is the difference between its terminal point and its initial point:

  u = P2 -P1 = (6-8, 5-3) = (-2, 2)

  v = P4 -P3 = (9-11, 10-8) = (-2, 2)

Vectors u and v are both (-2, 2), so are equivalent vectors.

tube or goog would be a great resource to with that question