The number of vectors of unit length perpendicular to the vectors `veca=2hati+hatj+2hatkandvecb=hatj+hatk` is
A. one
B. two
C. three
D. infinite
A. one
B. two
C. three
D. infinite
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The number of vectors of unit length perpendicular to the vectors `vecaandvecb” is “vecc`
(say) i.e., `vecc=+-(vecaxxvecb)`
So, there will be two vectors of unit length perpendicular to the vectors `vecaandvecb`.