以能力立意,在知识交汇点处命题是近几年高考命题的整体趋势.而对三角函数知识的考查,常常是把三角函数放在三角形内部,与正余弦定理、解斜三角形融合,与向量,不等式等交叉结合,增强了对学生综合运用所学知识解 With ability conception, the proposition of knowledge convergence is the overall tendency of college entrance examination proposition in recent years.As for the knowledge of trigonometric function, the trigonometric function is often placed inside the triangle, and the sine cosine theorem, solution of oblique triangle fusion, vector , Inequality and other cross-combination, enhance the comprehensive use of knowledge learned by students