What are points of inflection?

Find the points of inflection of the gmph of the function. [If an answer does not exist, enter DNE.} x} = 5 sin x + 6 cos x, [0, 211?] (|:| ) {smallerxvalue} (|:| ) {largErX-value} Describe the concavity. {Enter 1your answers using internal notation.) E E (X. r} (3', 1r") concave upward concave downward