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where are the curves?

Okay so we first plot the functions

http://www.wolframalpha.com/input/?i=Plot%5B{5-4cos%5Bx%5D%2Ccos%5Bx%5D}%5D{x%2C0%2CPi%2F2}%5D

no I think your right too

ohh i see your graph has a bigger scale xD

Yes, exactly

okay, so can we set the two equations equal to eachother, to find the boundaries?

ooh i thought it intersected near the very beginning cuz it was so close lol

Hold on

The second part ask, should you integrate with respect to x or y
what do you think?

Okay,it is a matter of convenience, you can do with either

If we were to integrate with respect to x we can see that
cos[x] is always below the other function

oh wait. is it because the highest y value cosx can go is either -1 or 1

and for the other function, it can go higher than that

how about when you integrate with respect to y?

Go here
http://www.twiddla.com/537036