Let f(x) = x cos x. Find f (x), observing the derivative of a product property. From the
Chapter 9, Problem R1(choose chapter or problem)
Let f(x) = x cos x. Find f (x), observing the derivative of a product property. From the results, find an equation for the indefinite integral x sin x dx. Check your work by using the equation to evaluate the definite integral x sin x dx and comparing it with the approximate answer you get by numerical integration.
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