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JEE Mains · Maths · STD 12 - 2. inverse trigonometric function

फलन \(f ( x )=\sin ^{-1}\left(\frac{ x ^2-3 x +2}{ x ^2+2 x +7}\right)\) का प्रांत है

  1. A \([1, \infty)\)
  2. B \((-1,2]\)
  3. C \([-1, \infty)\)
  4. D \((-\infty, 2]\)
Verified Solution

Answer & Solution

Correct Answer

(C) \([-1, \infty)\)

Step-by-step Solution

Detailed explanation

\(f(x)=\sin ^{-1}\left(\frac{x^{2}-3 x+2}{x^{2}+2 x+7}\right)\) Domain \(\frac{x^{2}-3 x+2}{x^{2}+2 x+7} \geq-1\) and \(\frac{x^{2}-3 x+2}{x^{2}+2 x+7} \leq 1\) \(2 x^{2}-x+9 \geq 0\) and \(5 x \geq-5 \Rightarrow x \geq-1\) \(x \in R\) Hence Domain \(x \in[-1, \infty)\)
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