Determine the value of \\lambda if planes 2 x+4 y-4 z=6 and \\lambdax+3 y+9=0 make an angle of \cos ^{-1}({1}/{\\sqrt{2})

UPSC NDA Math Model Paper 1

Question : 74 of 120

Marks: +1, -0

Determine the value of λ if planes 2x+4y−4z=6 and λx+3y+9=0 make an angle of cos−1(

√2

)

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