count the determinant of nxn matrix where $a_ij=sin(iw_j)$ I have no idea how to make. Thanks in advance for any help....
This is the second time, at least, you've aksed this question, and if you continue to post it in such a sloppy way then again nobody's going to try to help you: WHAT IS w_i?? Without this is impossible to answer the question.
Now, anyway: to answer this question do the determinant 1 x 1, 2 x 2 ,
3 x 3...to get some feeling about what's going on, and then perhaps you'll discover some pattern.