Question: ffPart IV: Consider the function f (x) = cos (=) = 0 19. Graph the function on the window - n, n, x [-2,2,

\f\fPart IV: Consider the function f (x) = cos (=) = 0 19. Graph the function on the window - n, n, " x [-2,2, 1]. Draw a sketch of your graph. 20. What is the domain of the function? All real numbers except x = 0 > (-co, 0) u (0, 00) 21. Describe the behavior of the function (graph) as x approaches 0. The function oscillates as x approaches 0 from both sides. 22. How many solutions does the equation cos (#) = 0 have in the interval [-1, 1]? Find the solutions. Technically, there are an infinite number of solutions on this interval. 23. Does the equation cos (=) = 0 have a greatest solution? If so, approximate the solution. If not, explain. Yes, there is a greatest solution, it is approximately x = 0.6366. (0 837, 0)

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