यदि $f(x) = \int {\left( {\frac{{{x^2} + {{\sin }^2}x}}{{1 + {x^2}}}} \right)} {\sec ^2}x\,dx$ और $f(0) = 0$ है,तो $f(1)$ का मान ज्ञात कीजिए।

  • A
    $\tan 1 - \frac{\pi}{4}$
  • B
    $\tan 1 + 1$
  • C
    $\frac{\pi}{4}$
  • D
    $1 - \frac{\pi}{4}$

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यदि $\int \operatorname{cosec}^5 x \, dx = \alpha \cot x \operatorname{cosec} x \left(\operatorname{cosec}^2 x + \frac{3}{2}\right) + \beta \log_e \left|\tan \frac{x}{2}\right| + C$,जहाँ $\alpha, \beta \in R$ और $C$ समाकलन स्थिरांक है,तो $8(\alpha + \beta)$ का मान ज्ञात कीजिए।

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