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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. \(\pm \left(\dfrac{1}{\sqrt{6}}, \dfrac{1}{\sqrt{6}}, \dfrac{1}{\sqrt{6}}\right)\) | |