Answer Happy

I need some help understanding this better, I got this wrong on
my exam. Question a, b and c are all part of the question being
ask, please answer a, b and c.
(6 points) Several students are discussing how to evaluate sin(0). For each of the following, explain whether their reasoning is right or wrong, and why. a) Student A says sin (0) = 0 because anything multiplied by zero is zero. correct b) Student B says sin- (0) is 1 because the opposite of sine is cosine and the other coordinate at that point is one. Wrong because anything multiplied by Zero is zero x c) Student C says sin 'O) is undefined because the reciprocal of 0 is 1/0 and anything divided by O is undefined. Correct