For any matrix A, AAT and ATA are symmetric matrices. Using Properties of the Transpose, we have which of the following? O (AAT)T = A"(AT) = AAT O (AAT)T = A"(ATT) = AAT O (AAT)T = (AT)TAT = AAT O (AAT)T = (AT T)AT = AAT O (AAT)T = (A2T)AT = AAT %3D %3D We also know which of the following to be true? O (ATA)T = A"(ATT) = ATA O (ATA)T = (AT)TAT = A'A O (ATA)T = AT(AT)T = ATA O (ATA)T = AT(A2T) = ATA O (ATA)T = (AT T)AT = ATA %3D So each of AA and ATA is equal to ---Select-- so both matrices are sym

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