समीकरण $\cos 4x = \cos 2x$ का व्यापक हल ज्ञात कीजिए।

  • A
    $x = \frac{n\pi}{3}$ या $x = n\pi$,$n \in \mathbb{Z}$
  • B
    $x = \frac{n\pi}{2}$ या $x = n\pi$,$n \in \mathbb{Z}$
  • C
    $x = \frac{n\pi}{4}$ या $x = n\pi$,$n \in \mathbb{Z}$
  • D
    $x = n\pi$,$n \in \mathbb{Z}$

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