$\mathop \smallint \limits_0^\pi \sqrt {1 + 4{{\sin }^2}\frac{x}{2} - 4\sin \frac{x}{2}} \;dx = $

  • A
    $4\sqrt 3 - 4$
  • B
    $4\sqrt 3 - 4 - \frac{\pi }{3}$
  • C
    $\pi - 4$
  • D
    $\frac{2\pi }{3} - 4\sqrt 3 - 4$

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समीकरण $\int_{\sqrt{2}}^{x} \frac{dt}{t\sqrt{t^2-1}} = \frac{\pi}{2}$ के लिए $x$ का हल ज्ञात कीजिए।

यदि $f(x) = \int_{-1}^{x} |t| dt$ है,तो किसी भी $x \geq 0$ के लिए,$f(x)$ का मान क्या होगा?

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