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

यदि \(\frac{ dy }{ dx }+2 y \tan x =\sin x , 0 < x < \frac{\pi}{2}\), \(y \left(\frac{\pi}{3}\right)=0\) हैं, तो \(y ( x )\) का अधिकतम मान है :

  1. A \(\frac{1}{8}\)
  2. B \(\frac{3}{4}\)
  3. C \(\frac{1}{4}\)
  4. D \(\frac{3}{8}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\frac{1}{8}\)

Step-by-step Solution

Detailed explanation

\(\frac{d y}{d x}+2 y \tan x=\sin x\) \(I \cdot F=e^{\int 2 \tan x d x}=e^{\operatorname{mn}(\sec x)^{2}}=\sec ^{2} x\) \(y\left(\sec ^{2} x\right)=\int \sin x \sec ^{2} x d x+C\) \(y \cdot \sec ^{2} x=\sec x+C\) Put \(x=\frac{\pi}{3}, y=0\) \(y=\cos x-2 \cos ^{2} x\)…
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