Use the known properties (i.e. domain, range, amplitude, period, etc.) of each function to sketch its graph for -2n sxs 2n 16. y = 2(cot x) - 3 17. y = -3 (csc 2x) 2 18. y = 2(sec 3x) 1 19. y = 2 sin (x +) -1 20. y = tan (2x +) - 2