$\int\limits_0^{\frac{\pi }{4}} (\cos 2x)^{3/2} \cos x \,dx =$

  • A
    $\frac{3\pi}{16}$
  • B
    $\frac{3\pi}{32}$
  • C
    $\frac{3\pi}{16\sqrt{2}}$
  • D
    $\frac{3\pi\sqrt{2}}{16}$

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वक्रों $y = \int\limits_{x^2}^{x^3} \sqrt{5 - t^2} \, dt$ और $x$-अक्ष के बीच का प्रतिच्छेदन कोण (जहाँ $x \neq 0$) ज्ञात कीजिए:

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