1. The problem statement, all variables and given/known data Hello again, not looking for anyone to solve this problem this time I just need to know what the operation I'm supposed to do is called, so I can go research it and learn it. If sin(t) = -12/13 with 3pi/2 < t < 2pi, find the following: b) cos(t - 11pi/6) 2. Relevant equations I'm assuming this is a trigonometric function that is about graphing these things. But I'm not sure. >_< 3. The attempt at a solution As I said, I'm not looking for the solution. Just what kind of operation this is.