Let \(\vec a = \hat i - \hat j + \hat k\) and \(\vec b = \hat i + \hat j - \hat k\) then unit vector perpendicular to the plane containing \(\vec a\) and \(\vec b\) is

\(\sqrt 2({\hat j + \hat k} )\)

\(\frac{{\hat j\;+\;\hat k}}{{\sqrt 2 }}\)

\(\sqrt 2 ({\hat j - \hat k})\)

\(\frac{{\hat j\;-\;\hat k}}{{\sqrt 2 }}\)

Let \(\vec a = \hat i - \hat j + \hat k\) and \(\vec b = \hat i + \ha

1.	Let \(\vec a = \hat i - \hat j + \hat k\) and \(\vec b = \hat i + \hat j - \hat k\) then unit vector perpendicular to the plane containing \(\vec a\) and \(\vec b\) is
A.	\(\frac{{\hat j\;+\;\hat k}}{{\sqrt 2 }}\)
B.	\(\sqrt 2({\hat j + \hat k} )\)
C.	\(\sqrt 2 ({\hat j - \hat k})\)
D.	\(\frac{{\hat j\;-\;\hat k}}{{\sqrt 2 }}\)
Answer» B. \(\sqrt 2({\hat j + \hat k} )\)

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Let \(\vec a = \hat i - \hat j + \hat k\) and \(\vec b = \hat i + \hat j - \hat k\) then unit vector perpendicular to the plane containing \(\vec a\) and \(\vec b\) is

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