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人民教育出版社出版的数学第一册(下)(试验本)P45例5. 求证:cosa+√3sina=2sin(π/6+a).它事实上是介绍了一种三角函数的变形技巧.而这种变形技巧所蕴含的数学思想是化归思想,把形如asina+
The first volume of mathematics published by the People’s Education Press (bottom) (test version) P45 Example 5. Proof: cosa+√3sina=2sin(π/6+a). It is in fact a description of a trigonometric function deformation technique. The mathematics thoughts contained in this deformation technique are turned into ideas and shaped like asina+.