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If y = x cos x, find dy/dx

Mathematics
JAMB 2007
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
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Correct Answer: Option D
Explanation
y = x cos x
dy/dx = 1. cos x + x (-sin x)
= cos x - x sin x

There is an explanation video available below.

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Explanation Video

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