MCQ
फलन $f(x)=\sin ^4 x+\cos ^4 x$ का आवर्तकाल है :
  • A
    $\pi$
  • $\frac{\pi}{2}$
  • C
    $2 \pi$
  • D
    कोई नहीं (None)

Answer

Correct option: B.
$\frac{\pi}{2}$
(B)

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