1.

If vec(a)=hat(i)+hat(j)+hat(k),vec(a).vec(b)=1andvec(a)xxvec(b)=hat(j)-hat(k), then vec(b) is

Answer»

`HAT(i)-hat(J)+hat(k)`
`2HAT(j)-hat(k)`
`hat(i)`
`2hat(i)`

Answer :C


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