1) Find the Critical Numbers for
after all the work is done I get
There aren't any critical numbers is what I got but I'm not sure.
2) Find the Critical Numbers for
I get as a critical number but I'm not sure if it's right or the only answer
3) Find the Absolute max and min for
in the interval
after simplifying the derivative for it I get:
I don't know what to do with it since I am bad with trig functions in these types of problems.