Can some one awnser the following

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

What kind of bond pays interest which is exempt from tax?

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.