यदि $\int \frac{\sin ^8 x-\cos ^8 x}{1-2 \sin ^2 x \cos ^2 x} d x=A \sin 2 x+B$ है,तो $A$ का मान ज्ञात कीजिए।

  • A
    $-\frac{1}{2}$
  • B
    -$1$
  • C
    $\frac{1}{2}$
  • D
    $1$

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यदि $\int {\frac{{\tan x}}{{1 + \tan x + {{\tan }^2}x}}dx} = x - \frac{K}{{\sqrt A }}{\tan ^{ - 1}}\left( {\frac{{K\tan x + 1}}{{\sqrt A }}} \right) + C,$ ($C$ समाकलन का एक स्थिरांक है),तो क्रमित युग्म $(K, A)$ बराबर है:

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