सीमा का मूल्यांकन करें: $\lim _{x \rightarrow 0} \frac{4[\sin (2022 x)-\sin (2020 x)]}{x[\cos (2022 x)+2 \cos (2021 x)+\cos (2020 x)]}$

  • A
    $1$
  • B
    $2$
  • C
    $2020$
  • D
    $2021$

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$\lim _{x \rightarrow 0} \frac{\sin ^{2}\left(\pi \cos ^{4} x\right)}{x^{4}}$ का मान ज्ञात कीजिए।

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