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JAMB Mathematics 2008 Objective — Question 38

Question 38 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2008 Objective paper, with the correct answer and a full explanation.

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Differentiate sin x - x cos x

  • A. x sin xCorrect
  • B. x sin x C
  • C. -x cos x D
  • D. -x sin x

Explanation

d/dx(sinx - xcosx) = cosx - (cosx - xsinx) = cosx - cosx + xsinx = x sinx.

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