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

यदि अवकल समीकरण \(\frac{ dy }{ dx }+(\tan x ) y =\sin x\), \(0 \leq x \leq \frac{\pi}{3}\), का हल \(y = y ( x )\) है जबकि \(y (0)=0\) है, तो \(y \left(\frac{\pi}{4}\right)\) बराबर है

  1. A \(\frac{1}{4} \log _{ e } 2\)
  2. B \(\left(\frac{1}{2 \sqrt{2}}\right) \log _{ e } 2\)
  3. C \(\log _{ e } 2\)
  4. D \(\frac{1}{2} \log _{ e } 2\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\left(\frac{1}{2 \sqrt{2}}\right) \log _{ e } 2\)

Step-by-step Solution

Detailed explanation

\(\frac{d y}{d x}+(\tan x) y=\sin x ; 0 \leq x \leq \frac{\pi}{3}\) I.F. \(=e^{\int \tan x d x}=e^{\ell \sec x}=\sec x\) \(y \sec x=\int \tan x d x\) \(y \sec x=\int \tan x d x\) \(y \sec x=\ell n|\sec x|+C\) \(x=0, y=0 \quad \Rightarrow \quad \therefore c=0\)…
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