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JEE Main Math Class 12 Three Dimensional Geometry Part 1 Questions

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Question : 50

Total: 100

The acute angle between two lines such that the direction cosines l,m,n, of each of them satisfy the equations l+m+n=0 and l2+m2−n2=0 is

[Online April 22, 2013]

15°
30°
60°
45°

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