PLEASE HELP FAST!!

determine which two equations are the same.

A. Y= -tan(x - pi/2)
B. Y= cot (x + pi/2)
C. Y= -cot(x - pi)
D. Y= -tan(x- pi)

A. a & b
B. b & d
C. a & d
D. c & d

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)