Question: 9. Let y = x + 2 cos(x), at which of these values is the tangent line horizontal? (A) I= (B) x= 6 (C) I

9. Let y = x + 2 cos(x), at which of

these values is the tangent line horizontal? (A) I= (B) x= 6

9. Let y = x + 2 cos(x), at which of these values is the tangent line horizontal? (A) I= (B) x= 6 (C) I = A (D) 1= 3 (E)

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