Since the three components of [b]A[/b] act in the positive [b]i[/b], [b]j[/b], and [b]k[/b] directions, we can write [b]A[/b] in Cartesian vector form as [br][br][center][b]A[/b] = A[sub]x[/sub][b]i [/b]+ A[sub]y[/sub][b] j[/b] + A[sub]z[/sub][b]k[/b] [/center]