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If the direction cosines of two perpendicular lines are connected by the relations then is
detailed solution
Correct option is C
The direction cosines of two lines are related by relations al+bm+cn=0 and ul2+vm2+wn2=0 . If these two lines are perpendicular then the condition is ∑a2v+w=0Herea=λ,b=3,c=−5,u=10,v=1,w=−5Hence, ∑a2v+w=0λ2−4+95+2511=0−4λ2+320=0Therefore, λ=±45⇒λ5=±4Talk to our academic expert!
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