Definition of Inner Product
                   For and , the inner-product of  u  and  v  is defined by,
                  Geometrically, if   and    then       is nothing but the area of parallelogram OBDC,

                  which is same as the area of the rectangle OFEC

                                  and    ,   We have



                  Hence, we conclude that the Area of OFEC is equal to the Area of OBCD

                  To see this in the applet do the following :

                  1. Drag red point A and point B to select the vectors u and v

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