Determine the direction cosines of the unit vector perpendicular to the plane r^{\rightarrow} \cdot (2ı^{^}−6ȷ^{^}−3k^{^}) + 1 = 0 passing through the origin?

Correct Answer is : - 2/7, 6/7, 3/7

AAI ATC Junior Executive 25 Mar 2021 Shift 2 Paper

Question : 65 of 120

Marks: +1, -0

Determine the direction cosines of the unit vector perpendicular to the plane

r↖{⟶} ⋅ (2ı↖{^}−6ȷ↖{^}−3k↖{^}) + 1 = 0

passing through the origin?

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