Lines OA and OB are drawn from O with direction cosines proportional to <1, -2, -1>

+2 votes

asked Mar 12, 2019 in Class 12 by kratos

Lines OA and OB are drawn from O with direction cosines proportional to <1, -2, -1> and <3, -2, 3>, respectively. The direction ratios of the normal to the plane AOB are

(a) <4, 3, 2>

(b) <4, -3, -2>

(c) <-4, 3, -2>

(d) <4, 3, -2>

the plane
upsee
class-10
constructions
class-12
three dimensional geometry

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1 Answer

+1 vote

answered Jan 21, 2020 by kratos

Best answer

Correct Option**(d) <4, 3, -2>**

Explanation:

Lines OA and OB are drawn from O with direction cosines proportional to <1, -2, -1>

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