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Multiple choice

If the roots of the given equation $(\cos p - 1)x^2+(\cos p)x+\sin p=0$ are real, then

  1. $p \in (-\pi, 0)$
  2. $p \in \left(-\frac{\pi}{2}, \frac{\pi}{2}\right)$
  3. $p \in (0, \pi)$
  4. $p \in (0, 2\pi)$
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C Correct answer

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  • Algebra (3715 questions)
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