Find the vector perpendicular to vector Ã= (31-j-k) and B=(-1-1+k)
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Answer:
Given
a
=
i
^
−7
j
^
+7
k
^
,
b
=3
i
^
−2
j
^
+2
k
^
a
×
b
=
∣
∣
∣
∣
∣
∣
∣
∣
i
^
1
3
j
^
−7
−2
k
^
7
2
∣
∣
∣
∣
∣
∣
∣
∣
=
i
^
(−14+14)−
j
^
(2−21)+
k
^
(−2+21)=19(
j
^
+
k
^
)⟹∣
a
×
b
∣=19
2
The unit vector perpendicular to both the vectors
a
,
b
is
∣
a
×
b
∣
a
×
b
=
19
2
19(
j
^
+
k
^
)
=
2
j
^
+
k
^
Step-by-step explanation:
l hope you help you
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