“trigonometric series”的概念、定义、翻译、参考文献-科学参考

单词	trigonometric series
释义	trigonometric series Chemical Engineering An expression for the sine and cosine trigonometric functions as convergent power series: $\begin{array}{l} \sin x = \frac{x}{1!} - \frac{x^{3}}{3!} + \frac{x^{5}}{5!} - \frac{x^{7}}{7!} + … \\ \cos x = 1 - \frac{x^{2}}{2!} + \frac{x^{4}}{4!} - \frac{x^{6}}{6!} + … \end{array}$
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