Ineed on this one. i was able to get the second coordinate / answer, but i am having trouble finding the first coordinate / answer

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Bill works as a waiter and is keeping track of the tips he ears daily. about how much does bill have to earn in tips on sunday if he wants to average $22 a day? tips by day tips (dollars) monday tuesday wednesday thursday friday saturday $14 $22 $28 $36

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?