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JEE Mains · Maths · STD 11 - 3. trignometrical ratios,functions and identities

\('k'\) के पूर्णाकीय मानों, जिनके लिए समीकरण \(3 \sin x +4 \cos x = k +1\) का एक हल है, \(k \in R\) है, की संख्या है

  1. A \(11\)
  2. B \(22\)
  3. C \(33\)
  4. D \(7\)
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Answer & Solution

Correct Answer

(A) \(11\)

Step-by-step Solution

Detailed explanation

\(3 \sin x+4 \cos x=k+1\) \(\Rightarrow k +1 \in\left[-\sqrt{3^{2}+4^{2}}, \sqrt{3^{2}+4^{2}}\right]\) \(\Rightarrow k +1 \in[-5,5]\) \(\Rightarrow k \in[-6,4]\) No. of integral values of \(k =11\)
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