समाकल का मूल्यांकन करें: $\int \frac{\sin x}{\sin 4x} dx$

  • A
    $\frac{1}{4\sqrt{2}} \log \left| \frac{1 + \sqrt{2} \sin x}{1 - \sqrt{2} \sin x} \right| + \frac{1}{4} \log |\sec x + \tan x| + c$
  • B
    $\frac{1}{4\sqrt{2}} \log \left| \frac{1 + \sqrt{2} \sin x}{1 - \sqrt{2} \sin x} \right| - \frac{1}{4} \log |\sec x + \tan x| + c$
  • C
    $\frac{1}{4\sqrt{2}} \log \left| \frac{1 - \sqrt{2} \sin x}{1 + \sqrt{2} \sin x} \right| + \frac{1}{4} \log |\sec x + \tan x| + c$
  • D
    $\frac{1}{4\sqrt{2}} \log \left| \frac{1 - \sqrt{2} \sin x}{1 + \sqrt{2} \sin x} \right| - \frac{1}{4} \log |\sec x + \tan x| + c$

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यदि $\int \frac{3x + 7}{x^2 - 3x + 2} dx = m \log |x - 2| + n \log |x - 1| + c$, जहाँ $m, n \in R$ और $c$ एक समाकलन स्थिरांक है, तो $m + n =$ का मान है:

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