PLZ HELP ASAP
I am struggling with this unit
1. Find sin0 is cos0 = 1/2 and 0 terminates in quadrant IV.
2. Find cos0 if sin0 = sqrt2/2 and 0 terminates in Quadrant I.
3. Find tan0 if cos0 = -1/2 and 0 terminate in Quadrant II.
4. Find tan0 if sin0 = -1 and 0 is less than or equal to 0 < 2 pi radians radians.

9/10 divide by -3/15 as a mixed number

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Jack is considering a list of features and fees for current bank: jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements? a. $44 b. $104 c. $144 d. $176