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JEE Mains · Maths · STD 12 - 9. differential equations

यदि दिए गए अवकल समीकरण \(\left(e^y+1\right) \cos x d x+e^y \sin x d y=0\) का हल \(y(x)\) बिंदु \(\left(\frac{\pi}{2}, 0\right)\) से होकर गुजरता है, तो \(e^{y\left(\frac{\pi}{6}\right)}\) का मान .......... है।

  1. A \(8\)
  2. B \(3\)
  3. C \(7\)
  4. D \(33\)
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Answer & Solution

Correct Answer

(B) \(3\)

Step-by-step Solution

Detailed explanation

\( \left(e^y+1\right) \cos x d x+e^y \sin x d y=0 \) \( \Rightarrow d\left(\left(e^y+1\right) \sin x\right)=0 \) \( \left(e^y+1\right) \sin x=C\) It passes through \(\left(\frac{\pi}{2}, 0\right)\) \(\Rightarrow \mathrm{c}=2\) Now, \(x=\frac{\pi}{6}\)…
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