यदि $\int \frac{5 \tan (x)}{\tan (x)-2} d x = x + a \log |\sin (x) - 2 \cos (x)| + k$ है,तो $a$ का मान ज्ञात कीजिए।

  • A
    -$1$
  • B
    -$2$
  • C
    $1$
  • D
    $2$

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$\text{यदि } \int \frac{1}{\operatorname{cosec} x+\cos x} d x = \frac{1}{2 \sqrt{3}} \log |f(x)| - \int \frac{\cos x-\sin x}{2+\sin 2 x} d x + c, \text{ तो } x = \frac{\pi}{3} \text{ पर } |f(x)| = $

यदि $\int \frac{(x^2-1)}{(x+1)^2 \sqrt{x(x^2+x+1)}} dx = A \tan^{-1}\left(\sqrt{\frac{x^2+x+1}{x}}\right) + C$, जहाँ $C$ एक स्थिरांक है, तो $A$ का मान ज्ञात कीजिए।

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