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Mathematics
Problem
Point
A
A
A
has coordinates
(
2
,
−
3
)
(2,-3)
(
2
,
−
3
)
and point
B
B
B
has coordinates
(
−
2
,
5
)
(-2,5)
(
−
2
,
5
)
. Which of the following is the unit vector directed from
A
A
A
to
B
B
B
? a)
0.447
i
^
−
0.894
j
^
0.447\,\mathbf{\hat{i}}-0.894\,\mathbf{\hat{j}}
0.447
i
^
−
0.894
j
^
b)
−
4
i
^
+
8
j
^
-4\,\mathbf{\hat{i}}+8\,\mathbf{\hat{j}}
−
4
i
^
+
8
j
^
c)
−
0.447
i
^
+
0.894
j
^
-0.447\,\mathbf{\hat{i}}+0.894\,\mathbf{\hat{j}}
−
0.447
i
^
+
0.894
j
^
d)
−
0.894
i
^
+
0.447
j
^
-0.894\,\mathbf{\hat{i}}+0.447\,\mathbf{\hat{j}}
−
0.894
i
^
+
0.447
j
^
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