Let L be the line of intersection of the planes `2x+3y+z=1 and x+3y+2z=2`. If L makes an
Channel: Doubtnut
Date: 2020-05-24

Let L be the line of intersection of the planes `2x+3y+z=1 and x+3y+2z=2`. If L makes an angle `alpha` with the positive X=axis, then `cosalpha` equals