三角恒等变换内容尽管不多,却是发展同学们推理能力和运算能力的重要载体.同时三角恒等变换也是高考数学的必考内容,一般会与三角函数、解三角形、平面向量等知识综合运用,体现在三角形、应用型问题或纯三角函数性质问题等题型中.三角恒等变换说起来就那么几个公式、那么几个套路,但从实际考试效果看,还是 Triangle constant transformation content, though small, but it is an important carrier for the development of students reasoning ability and computing power.At the same time, the triangle transformation is also the college entrance examination mathematics compulsory content, usually with trigonometric function, solution triangle, plane vector knowledge synthesis Use, reflected in the triangle, the problem of application type or the nature of the pure trigonometry questions etc .. Triangle constant transformation so to speak so several formulas, then a few routines, but the actual test results, or