If ( ) 2 sin f x x x , then what is the slope of the tangent line to the graph of f ( x ) when x 2

Question

If ( ) 2 sin f x x x   , then what is the slope of the tangent line to the graph of f ( x ) when x   2

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Question: If ( ) 2 sin f x x x = , then what is the slope of the tangent line to the graph of f