The first chapter is the reading and thinking of trigonometric function 1. 1 and trigonometric function of curvature system 1.2; Trigonometry and astronomy1.3; Inductive formula of trigonometric function1.4; Exploration and discovery of images and properties of trigonometric functions y=Asin(ωx+φ) and Y = ACOS (ω x+) Explore and discover the properties of sine and cosine functions by using trigonometric functions in the unit circle. Information technology is used to read and think about amplitude, period, frequency, Summary of Simple Application of Trigonometric Function Model with Phase 1.6 Review and refer to Chapter II Practical Background and Basic Concepts of Plane Vector 2. 1 Reading and Thinking about the Origin of Vector and Vector Symbol 2.2 Linear Operation of Plane Vector 2.3 Basic Theorem and Coordinate Representation of Plane Vector 2.4 Quantitative Product of Plane Vector 2.5 Reading and Thinking of Plane Vector Operation (Algorithm) The application examples of and the summary of graph properties refer to Chapter III trigonometric identity transformation 3. 1 sum and difference formula of sine, cosine and tangent. The application of information technology to make trigonometric functions Table 3.2 Simple trigonometric identity transformation summary review reference postscript.