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If veca=lambdahati+3hatj+2hatk and vecb=...

If `veca=lambdahati+3hatj+2hatk and vecb=hati-3hatj+3hatk` are perpendicular to each other, the value of `lambda` is.

A

3

B

`-3`

C

6

D

9

Text Solution

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The correct Answer is:
B
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If veca=lambdahati+3hatj+2hatk and vecb=hati-hatj+3hatk are per[endicular to each other, the value of lambda is :

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Knowledge Check

  • If veca=3hati-hatj+2hatk and vecb=hati-3hatk then veca.vecb is

    A
    3
    B
    -3
    C
    4
    D
    None of these

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