Physics Senior High over 5 yearsago

この問題の公式？をど忘れしてしまいました... 解説お願いします🙇‍♀️

A = 15 units D = 10 units west B = 5 units east C=8units south 1.Fill the grey boxes in the table. (Use the answer sheet.) X-cOmDonent Y-component 2 marks each, Total 20 marks of the resultant vector? Write your calculation on the answer sheet