Question

If A vector = Axi, B vector = Byj, C vector = A vector + B vector and D vector = A vector × B vector, then C vector • D vector is equal to what

Answer 1

Given
A= axi
B=byj
Given
C=A+B= axi+byj
D=A*B
SINCE A and B are perpendicular vector ( A in x direction and B in y directio ,their product will be 0)
SoD=0
NOW
C.D= C.0=0