1.

A line makes equal angle with coordinate axis. Direction cosines of this line are

A. ± (1, 1, 1)
B. \(\pm \left(\dfrac{1}{\sqrt{3}}, \dfrac{1}{\sqrt{3}}, \dfrac{1}{\sqrt{3}}\right)\)
C. \(\pm \left(\dfrac{1}{\sqrt{6}}, \dfrac{1}{\sqrt{6}}, \dfrac{1}{\sqrt{6}}\right)\)
D. \(\pm \left(\dfrac{1}{3}, \dfrac{1}{3}, \dfrac{1}{3}\right)\)
Answer» C. \(\pm \left(\dfrac{1}{\sqrt{6}}, \dfrac{1}{\sqrt{6}}, \dfrac{1}{\sqrt{6}}\right)\)


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