The Angle Between The Lines Whose Direction Cosines Are Given By The Equations L^2+m^2-n^2=0, L+m...

2023 3:48
Synopsis
The angle between the lines whose direction cosines are given by the equations l^2+m^2-n^2=0, l+m+n=0 is (a) cos ^-1(2 √(3)) ...
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