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ajinkya bhole Grade: 10
        

i am not understandin the concept of dot product nd cross product...


plzz explain me ....i am not understanding WHY is it used for????thnku

7 years ago

Answers : (1)

SAGAR SINGH - IIT DELHI
879 Points
										

Dear student,


The Dot Product

We define the dot product of two vectors

     v = ai + bj  and w = ci + d

to be


          v . w = ac + bd


 


The Cross Product Between Two Vectors











                          Definition  
Let u = ai + bj + ck  and v = di + ej + fk be vectors then we define the cross product v x w by the determinant of the matrix:


                                



 


W e can compute this determinant as


       


        =  (bf - ce) i + (cd - af) j + (ae - bd) k  


 





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Sagar Singh


B.Tech IIT Delhi




7 years ago
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