The Angle Between The Lines Whose Direction Cosines Satisfy The Equations 1+m+n=0 And L^2=m^2+n^2...

2023 3:04
Synopsis
The angle between the lines whose direction cosines satisfy the equations 1+m+n=0 and l^2=m^2+n^2 is (a) π/6 (b) π/2 (c) π/3 (d) ...
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