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If a=hati+4hatj+2sqrt(2)hatk and b=(hati...

If `a=hati+4hatj+2sqrt(2)hatk` and `b=(hati+hatj)sqrt(2)` then find component of a perpendicular to `b`

A

`5/(sqrt(2))`

B

`9/(sqrt(2))`

C

`7/(sqrt(2))`

D

None of these

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The correct Answer is:
A
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