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Aarin Covyeau Grade:
        

A  regular hexagon has vertices ABCDEF and it is centered at the origin O. Express the following vectors in terms of a=OA and b=OB


AB,BC,AD,CF,AC, and BC+DE+FA

6 years ago

Answers : (2)

DilipReddy Ask IITians expert-IITB
36 Points
										

Generally two laws of vectors are useed to  solve the problem: 1.triangle law 


2. parallogram law as shown if in fig1 and respectively.


1079_22425_2.jpg


In last fig hexgon drawn follow as per rules and  get solution like as............


from triangle OAB


AB=b-a


AD=OD-OA     (OD=-OA=-a)


AD=-2a


From triangle OBC


OB+BC=OC


To find OC   from triangle OAC...........OA+AC=OC.............          ( To find AC ..from OABC parllogram AC=-OA+AB=b-2a)


Now OC=a+b-2a=b-a


BC=-2a


remainig U can find similar procedure .


IF u have any doubts feel free to ask. We are here to help your IIT preparation.


All the best.


 

6 years ago
Aarin Covyeau
4 Points
										

Thanks a lot. but I don't see why BC would be -2a and not just -a

6 years ago
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