If and then show that A2 = B2 = C2 = I2.
given
......(1)
......(2)
......(3)
Hence,
From equation (1),(2) and (3),
and 
then show that A2 = B2 = C2 = I2.
......(1)
......(2)
......(3)
and then show that A2 = B2 = C2 = I2. ......(1) ......(2) ......(3)