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对简易逻辑的考查主要是判断命题真假、复合命题的组成、四种命题、充要条件的判定等,其中对充要关系的考查是热点。一、正确理解简单命题与复合命题应深刻理解简单命题概念和“或”、“且”、“非”等逻辑连接词的含义,熟悉p或q、p且q、非p等复合命题的真值表,在判断给定命题真假时,要特别对命题中的条件和结论全面分析。例1:(2009年海南卷)有四个关于三角函数的命题:
The examination of simple logic is mainly to determine the true and false propositions, the composition of the composite proposition, the four propositions, the necessary and sufficient conditions of judgment, etc., of which the relationship between the necessary and sufficient test is a hot spot. First, the correct understanding of simple propositions and composite propositions should be a deep understanding of the concept of simple propositions and “or ”, “and ”, “non ” and other logical connectives, familiar with p or q, p and q, p and other composite propositions truth table, in determining the true proposition of a given proposition, we should especially the proposition of the conditions and conclusions of a comprehensive analysis. Example 1: (2009 Hainan volume) There are four propositions about trigonometric functions: