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B
1, 0, 0
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C
0, 1, 0
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D
0, 0, 0
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Solution
The correct option is C
0, 1, 0
The y-axis makes angles 90o, 0o and 90o respectively with x, y and z-axis. Therefore, the direction cosines of x-axis are cos 90o, cos 0o, cos 90o i.e. 0, 1, 0 direction cosines of y-axis are 0, 1, 0