$\lim\limits _{x \rightarrow 0} \frac{\cos (\sin x)-\cos x}{x^{4}}$ का मान ज्ञात कीजिए :

  • A
    $\frac{1}{3}$
  • B
    $\frac{1}{4}$
  • C
    $\frac{1}{6}$
  • D
    $\frac{1}{12}$

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