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KEAM Periodic — practice questions

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Periodic questions and exercises with answers

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Evaluate $\displaystyle\int_0^{10\pi} |\sin x|\, dx$:Read the answer and worked solution →

Worked practice questions

Evaluate $\displaystyle\int_0^{10\pi} |\sin x|\, dx$:

  1. $0$ (odd function)
  2. $20$
  3. $10\pi$
  4. $2$
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Correct answer: B. $20$

$|\sin x|$ has period $\pi$. Over one period, $\int_0^\pi \sin x\, dx = 2$. **Ten periods:** $10 \times 2 = 20$.

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