यदि $\int_0^{\frac{\pi}{3}} \cos^4 x \, dx = a\pi + b\sqrt{3}$ है,जहाँ $a$ और $b$ परिमेय संख्याएँ हैं,तो $9a + 8b$ का मान ज्ञात कीजिए:

  • A
    $2$
  • B
    $1$
  • C
    $3$
  • D
    $\frac{3}{2}$

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