2-Find the critical numbers of the function. (Enter your answersas a comma-separated list. Use n to denote any arbitraryinteger values. If an answer does not exist, enter DNE.)
f(?) = 6 cos(?) + 3 sin2(?)
3- Consider the following.
f(x) = x5 ? x3 +9,    ?1 ? x ? 1
(a) Use a graph to find the absolute maximum and minimum valuesof the function to two decimal places.
minimum
(b) Use calculus to find the exact maximum and minimumvalues.
maximum
minimum
