近十年的一些高考题,若应用整体思想来处理,倒是别开生面,妙趣横生,它具有化生为熟、化繁为简的奇特作用,本文从九个方面举例说明。一、在三角中的应用例1求 sin~220°+cos~250°+sin20°cos50°的值。(95全国)解:整体代换令 A=原式;整体构造令 B=cos~220°+sin~250°+cos20°sin50°;整体运算 A+B=2+sin70° In the past ten years, some college entrance examination questions, if applied to the whole idea, are indifferent and interesting. It has a peculiar role that metaphysics is familiar and complicated and simple. This article illustrates from nine aspects. First, in the application of the triangle 1 seeking sin ~ 220 ° + cos ~ 250 ° + sin20 ° cos50 ° value. (95 nationwide) Solution: Overall substitution order A = original; overall structure order B=cos~220°+sin~250°+cos20°sin50°; overall operation A+B=2+sin70°