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pallavi pradeep bhardwaj Grade: 12
        

A unit vector perpendicular to plane determined by the points (1,-1,2) (2,0,-1) and (0,2,1) is

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear pallavui


poinys are given in a plane


so two vactor in that plane can be obtain


a= (2-1) i +( 0+1)j +(-1-2)k


   = i +j -3k


and   b= (0-1)i + (2+1) j +(1-2)k


          =-i +3j -k


now a vector perpendicular to plane is   r =a X b


for unit vector


          r= (a X b)/|a X b|


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Badiuddin


 

7 years ago
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