Quadrant boundaries are inclusive: 0 & 2π belong to Q I & Q IV, π/2 to Q I & Q II, π to Q II & Q III, 3π/2 to Q III & Q IV. Selecting either adjacent quadrant includes them.
Each version contains every selected (function × angle) combination exactly once, independently shuffled. When a max is set, each version is a random sample of that size. The .tex file contains the quiz(zes) followed by the answer key(s) on new pages.