I've always has trouble with graphs does anyone really understand this?

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

Alocal hamburger shop sold a combined total of 601 hamburgers and cheeseburgers on friday. there were 51 more cheeseburgers sold than hamburgers. how many hamburgers were sold on friday? a local hamburger shop sold a combined total of hamburgers and cheeseburgers on friday. there were more cheeseburgers sold than hamburgers. how many hamburgers were sold on friday?

If the owner of que legal services forgot to deduct a withdrawal from the balance per books, what entry would be necessary?