If y = x cos x, find dy/dx

If y = x cos x, find dy/dx
  • A.
    sin x – x cos x
  • B.
    sin x + x cos x
  • C.
    cos x + x sin x
  • D.
    cos x – x sin x
Correct Answer: Option D
Explanation

y = x cos x
dy/dx = 1. cos x + x (-sin x)
= cos x – x sin x

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