Find the points of inflection of the graph of the function I

Find the points of inflection of the graph of the function. (If an answer does not exist, enter DNE.)

1

3

Solution

There are a lot of questions to answer... Here are the derivatives... f\'(?) = -2sin(?) - 2sin(?)cos(?) f\'\'(?) = -2cos(?) - 2cos²(?) + 2sin²(?) Use your calculator to graph the above functions and determine the answers... a) (p, 2p) increase (0, p) decrease b) The min is probably at ? = p The max is DNE... c) There are like three inflection points... ? = {p/3, p, 5p/3}