Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Priyadarshan Choursiya
d. see at the last of attachment, I give you a simple method to check unitary and orthogonal matrix. note that orthogonal matrix is special case of unitary matrix. when all entries of a unitary matrix are real then it called orthogonal matrix
sir..is the last part of the attachment..(i.e. in note) the trick is for orthogonal or unitary.