Q23 of 44 Page 1057

Find a unit vector perpendicular to the plane ABC, where the points A, B, C, are , and respectively.

A unit vector perpendicular to the plane ABC will be,



Through the vertices we get the adjacent vectors as,




Here,


We


have


⇒


Thus, substituting the values of ,


in equation (i) we get


⇒


⇒


⇒


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