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The foot of the perpendicular drawn f...

The foot of the perpendicular drawn from the origin to a plane is `(1,2,-3)dot` Find the equation of the plane. or If `O` is the origin and the coordinates of `P` is `(1,2,-3),` then find the equation of the plane passing through `P` and perpendicular to `O Pdot`

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According to the question, we have tetrahedron as show in fig 2.12
`vec(AD)=2sqrt2hati-2hatk`
` and vec(OE)=3sqrt2hati+sqrt6hatj`
cosine of angle between the vectors is
`costheta=12/(sqrt12sqrt24)`
`1/sqrt2`
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