A calculus problem by Akshat Sharda

Calculus Level 4

lim⁡x→0cos⁡(sin⁡x)−cos⁡xx4=a\lim_{x\rightarrow 0} \dfrac{\cos(\sin x)-\cos x}{x^4}=a

Find 1a\dfrac{1}{a}.

Akshat Sharda by Akshat Sharda
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