Edexcel A Level Maths: Pure:复习笔记5.2.2 Transformations of Trigonometric Functions
Transformations of Trigonometric Functions
Transformations of trigonometric functions
- You should already have a good idea about translating, stretching and reflecting basic functions (see Transformations of Functions)
- The basic principles are exactly the same for transforming any trigonometric graph
- y = n cos x gives a vertical stretch or squash
- y = sin nx gives a horizonal stretch or squash
- y = tan (x + c) gives a horizonal translation
Exam Tip
- Always sketch with a pencil and draw a smooth curve.
- When you sketch the transformation of a graph, be sure to indicate the new coordinates of any points that are marked on the original graph.
- Try to indicate the coordinates of points where the new graph intersects the axes.
Worked Example
转载自savemyexams
国际竞赛真题资源免费领取
美高学分项目重磅来袭！立即了解
