1.Direction cosines l,m,nl,m,nl,m,n of two lines satisfy l+m+n=0l+m+n=0l+m+n=0 and lm=0lm=0lm=0. Angle between the lines isa.π/3\pi/3π/3b.π/4\pi/4π/4c.π/2\pi/2π/2d.0Login to continueOnly logged in users canattempt or see the solution.
