Find the scalar product of 2i^-2j^-3k^ and 4i^+3j^-k^.
Answers
Answered by
9
Answer:
Given,
a
=2
i
^
+3
j
^
+4
k
^
and
b
=
i
^
−2
j
^
+
k
^
So scalar product
a
.
b
=(2
i
^
+3
i
^
−4
k
^
)(i−2
j
^
+
k
^
)
=2.1+3(−1)−4(1)
=2−5−4 [Here
i
^
.
i
^
=1,
j
^
.
j
^
=1,
k
^
.
k
^
=1]
=2−10
=−8.
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