Question

11. Find the dot and cross product of two vectors if A= 5i - 2j +3k and B = 61 +2k​

Answer 1

Answer:

a⋅b=(3

i

^

−4

j

^

+5

k

^

)⋅(−2

i

^

+

j

^

−3

k

^

)

=−6−4−15

=−25

a×b=

∣

∣

∣

∣

∣

∣

∣

∣

i

^

3

−2

j

^

−4

1

k

^

5

−3

∣

∣

∣

∣

∣

∣

∣

∣

=7

i

^

−

j

^

−5

k

^

Note b×a=−7

i

^

+

j

^

+5

k

^

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