यदि $\sin x+\sin ^2 x=1$,जहाँ $x \in\left(0, \frac{\pi}{2}\right)$,तो $(\cos ^{12} x+\tan ^{12} x)+3(\cos ^{10} x+\tan ^{10} x+\cos ^8 x+\tan ^8 x)+(\cos ^6 x+\tan ^6 x)$ का मान ज्ञात कीजिए।

  • A
    $4$
  • B
    $3$
  • C
    $2$
  • D
    $1$

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यदि $3 \sin (\alpha-\beta)=5 \cos (\alpha+\beta)$ और $\alpha+\beta \neq \frac{\pi}{2}$ है,तो $\frac{\tan \left(\frac{\pi}{4}-\alpha\right)}{\tan \left(\frac{\pi}{4}-\beta\right)}=$

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