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If vec (a)= 2 hat (i) - hat (j) + hat (...

If ` vec (a)= 2 hat (i) - hat (j) + hat (k) and vec(b) = - hat (i) + 3 hat (j) + 4 hat (k) ` , then value of ` vec (a). vec(b) ` is -

A

1

B

3

C

`-3`

D

`-1`

Text Solution

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The correct Answer is:
d
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Knowledge Check

  • If vec (a) = 2 hat (i) - 3 hat (j) + 4 hat (k) and vec(b) = - 6 hat (i) + 9 hat (j) - 12 hat (k) , then

    A
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