PLEASE HELP ME WITH THIS PROBLEMm

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.

24m^2n+30mn^2+18mn, a sweet challenge!