Ineed , sincerely appreciate it , anyone who could assist me

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

Which of the functions below could have created this graph?

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad