If q be the angle between the unit vectors a and b, then \[\mathbf{a}-\sqrt{2}\,\mathbf{b}\] will be a unit vector if \[\theta =\]

\[p\mathbf{i}+q\mathbf{j}+r\mathbf{k}\]

If q be the angle between the unit vectors a and b, then \[\mathbf{a}-

1.	If q be the angle between the unit vectors a and b, then \[\mathbf{a}-\sqrt{2}\,\mathbf{b}\] will be a unit vector if \[\theta =\]
A.	\[\frac{\pi }{6}\]
B.	\[\frac{\pi }{4}\]
C.	\[p\mathbf{i}+q\mathbf{j}+r\mathbf{k}\]
D.	\[\frac{2\pi }{3}\]
Answer» C. \[p\mathbf{i}+q\mathbf{j}+r\mathbf{k}\]

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If q be the angle between the unit vectors a and b, then \[\mathbf{a}-\sqrt{2}\,\mathbf{b}\] will be a unit vector if \[\theta =\]

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