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JEE Mains · Maths · STD 11 - 4.2 Quadratic equations and inequations

समीकरण \(\sin ^2 \mathrm{x}+\left(2+2 \mathrm{x}-\mathrm{x}^2\right) \sin \mathrm{x}-3(\mathrm{x}-1)^2=0\) के हलों की संख्या, जहाँ \(-\pi \leq \mathrm{x} \leq \pi\), वह ........... है।

  1. A \(6\)
  2. B \(7\)
  3. C \(2\)
  4. D \(4\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(2\)

Step-by-step Solution

Detailed explanation

\( \sin ^2 x-\left(x^2-2 x-2\right) \sin x-3(x-1)^2=0 \) \( \left.\sin ^2 x-(x-1)^2\right) \sin x-3(x-1)^2=0\) \( \sin x=-3( reject) or (x-1)^2 \) \( \sin x=(x-1)^2\)
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