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Evaluate \(\int \sin 3x \mathrm d x\)

Mathematics
JAMB 2002

Evaluate \(\int \sin 3x \mathrm d x\)

  • A. (2/3) cos 3x + c
  • B. (1/3) cos 3x + c
  • C. (-1/3) cos 3x + c
  • D. (-2/3) cos 3x + c
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Correct Answer: Option C
Explanation

\(\int \sin 3x \mathrm d x = - \frac{\cos 3x}{3} + c\)

= \(-\frac{1}{3} (\cos 3x) + c\)


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