Q 2147112083.     The direction ratios of the lines OA and OB are 1, –2, –1 and 3, –2, 3. Then the direction cosines of the normal of plane AOB where O is the origin, are

JEE Mock Mains 04/10
A

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

B

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

C

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

D

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

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