If \[\mathbf{a}=\mathbf{i}-\mathbf{j}\] and \[\mathbf{b}=\mathbf{i}+\mathbf{k}\], then a unit vector coplanar with a and b and perpendicular to a is

If \[\mathbf{a}=\mathbf{i}-\mathbf{j}\] and \[\mathbf{b}=\mathbf{i}+\m

1.	If \[\mathbf{a}=\mathbf{i}-\mathbf{j}\] and \[\mathbf{b}=\mathbf{i}+\mathbf{k}\], then a unit vector coplanar with a and b and perpendicular to a is
A.	i
B.	j
C.	k
D.	None of these
Answer» E.

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If \[\mathbf{a}=\mathbf{i}-\mathbf{j}\] and \[\mathbf{b}=\mathbf{i}+\mathbf{k}\], then a unit vector coplanar with a and b and perpendicular to a is

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