1.

baralpha=a_(1)bari+a_(2)barj+a_(3)bark where a_(1), a_(2), a_(3) are rational numbers. If baralpha makes an angle 45^(0) with the vector bar beta=sqrt(2)i+3sqrt(2)j+4bark and |baralpha| is rational, then |baralpha| lies in

Answer»

ZX plane
YZ plane
XY plane
in the ANGLE between `-barbeta` and `baralpha`

ANSWER :C


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