| 两个三角恒等式的证明 |
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| 引用本文： | 白水周. 两个三角恒等式的证明[J]. 黄河水利职业技术学院学报, 2001, 13(4): 40-43 |
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| 作者姓名： | 白水周 |
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| 作者单位： | 开封大学,河南,开封,475004 |
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| 摘 要： | 《数学通报》1982年第 9期刊登了王勤国的《有关组合数的一个三角级数公式》一文 ,文中给出了一些三角恒等式 ,并指出这些恒等式用其它方法是不易证明的。本文通过探讨 ,给出了这些三角恒等式新的证明方法 ,而且证明过程并不复杂。
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| 关 键 词： | 三角恒等式 降幂公式 |
| 文章编号： | 1008-486X(2001)04-0040-04 |
| 修稿时间： | 2001-04-27 |
The Proof of Two Trigonometric Identity |
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| BAI Shui_zhou. The Proof of Two Trigonometric Identity[J]. Journal of Yellow River Conservancy Technical Institute, 2001, 13(4): 40-43 |
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| Authors: | BAI Shui_zhou |
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| Abstract: | The article, A Trigonometric Series Formular about Combinatorial Numbers , written by Wang Qin_guo and published in Mathematics Bulletin (No.2,1982), presented some trigonometic identity and pointed out that these were difficult to be proved by other methods. This paper gives the new methods to prove them and the proof process isn't complex. |
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| Keywords: | trigonometic identity power_descending formular |
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