February 23, 2017

Homework Help: Math

Posted by Momo on Wednesday, August 12, 2009 at 5:04pm.

Consider the function y=sqrt(1+cos2x)/2
(everything is under the square root)

a. Can x take on any real value?
b. How large can cos 2x become? How small?
c. How large can 1+cos2x/2 become? How small?
d. What are the domain and range of the original function?


For A, I put that x can be any real value, but the entire function would still be an irrational number.

As for B and C, I'm not exactly sure what values it's asking for. Like, how large or small can the values be without becoming a nonreal number?

And I think I could figure out D if I can figure out B and C. Help?


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