Which of the following statements correctly describes the minimum value of y=sinx in the interval [0,2π]?
(a) It occurs at x=2π and the minimum value is −1.
(b) It occurs at x=23π and the minimum value is 0.
(c) It occurs at x=23π and the minimum value is −1.
(d) It occurs at x=67π and the minimum value is −21.