If the d.r's of bar(OA),bar(OB) are (1,...

If the d.r's of `bar(OA),bar(OB)` are (1,-2,3),(-3,4,5) then the d.c's of the normal to the plane `bar(OAB)` are

`((4)/(sqrt(29)),(3)/(sqrt(29)),-(2)/(sqrt(29)))`

`((11)/(sqrt(171)),(7)/(sqrt(171)),(1)/(sqrt(171)))`

`((3)/(sqrt(29)),-(2)/(sqrt(29)),-(4)/(sqrt(29)))`

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