Can someone me with question 10 plz due tmrw

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy

Ben works in his dads bakery packing bagels each package can have no more then 16 bagels 3/4 of the bagels in each package are plain what other fractions could represent the part of the bagels in each package that will be plain