What is the value of n so that the angle between the lines having direction ratios (1, 1, 1) and (1, -1, n) is \[60{}^\circ \]?

What is the value of n so that the angle between the lines having dire

1.	What is the value of n so that the angle between the lines having direction ratios (1, 1, 1) and (1, -1, n) is \[60{}^\circ \]?
A.	\[\sqrt{3}\]
B.	\[\sqrt{6}\]
C.	3
D.	None of these
Answer» C. 3

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What is the value of n so that the angle between the lines having direction ratios (1, 1, 1) and (1, -1, n) is \[60{}^\circ \]?

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