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A non-zero vector veca is parallel to th...

A non-zero vector `veca` is parallel to the line of intersection of the plane determined by the vectors `hati, hati + hatj` and the plane determined by the vectors `hati – hatj, hati + hatk` . The angle between `veca` and`hati – 2hatj+ 2hatk` is

A

`pi/4`

B

`pi/3`

C

`pi/6`

D

`pi/2`

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A non vector veca is parallel to the line of intersection of the plane determined by the vectors hati,hati+hatj and thepane determined by the vectors hati-hatj,hati+hatk then angle between veca and hati-2hatj+2hatk is = (A) pi/2 (B) pi/3 (C) pi/6 (D) pi/4

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