a line has direction ratio 4,-12,18.Find its direction cosines
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l = a/√(a2 + b2 + c2)
l = 4/ √4^2 + (-12)^2 + (18)^2
l= 4/22
l = 2/11
Similarly,
m = -12/22
= -6/11
n = 18/22
= 9/11
l = 4/ √4^2 + (-12)^2 + (18)^2
l= 4/22
l = 2/11
Similarly,
m = -12/22
= -6/11
n = 18/22
= 9/11
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