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Unit vector perpendicular to hati - 2 ha...

Unit vector perpendicular to `hati - 2 hatj + 2hatk` and lying in the plance containing `hati + hatj + 2 hatk and -hati + 2 hatj + hatk` is :

A

`8hati - 7 hatj + 11 hatk`

B

`8hati + 7 hatj-11 hatk`

C

`8hati -7hatj - 11 hatk`

D

`(1)/(sqrt(234))(8hati-7hatj-11hatk).`

Text Solution

Verified by Experts

The correct Answer is:
D
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