[Solution] Prove that the Taylor series converges to f (x) by showing that R_n(x)→ 0 asn→ ∞ . cos x=∑limits_k=0^∞
Question: Prove that the Taylor series converges to f ( x ) by showing that \({{R}_{n}}(x)\to 0\ \text{as}\ n\to \infty \) .
\(\cos x=\sum\limits_{k=0}^{\infty }{{{(-1)}^{k}}\frac{{{x}^{2k}}}{(2k)!}}\)
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