I have these practice trig problems for a test. I understand the simple graphs but its these more complicated ones. y=2sec(3x-pi) my approach: I first find the period and phase shift. Since the period of a normal secant function which is 2pi. Then the period of this one is 2pi/3. The phase shift is pi/3. There is gonna a be a vertical strech of 2. After that I am stuck because I dont know how to exactly graph this even though I have all the information. Its mostly because of the odd period, 2pi/3. Really confused.