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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

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

Grade:10

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
10 years ago

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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