The second volume mainly studies trigonometric functions and plane vectors.

It doesn't make sense, because that's all it means.

Functions and trigonometric functions must be well studied, which is the basis of learning quadratic function images and solid geometry in senior two. It can be said that functions and trigonometric functions can't be learned well, and function images and solid geometry can't be learned well.

Extended data:

trigonometric function

① Understand the definition of trigonometric functions (sine, cosine and tangent) with the help of the unit circle.

② Derive inductive formulas (sine, cosine and tangent) with the help of trigonometric function lines in the unit circle, and draw pictures to understand the periodicity of trigonometric functions.

③ Understand the properties of sine function, cosine function and tangent function (such as monotonicity, maximum and minimum value, image intersecting with X axis, etc.). ) with the help of images.

④ Understand the basic relationship of trigonometric functions with the same angle:

⑤ Understand the practical significance with concrete examples; With the help of the image drawn by calculator or computer, we can observe the influence of parameters a and ω on the change of function image.

⑥ trigonometric function can be used to solve some simple practical problems, and it is recognized that trigonometric function is an important function model to describe periodic changes.

Baidu encyclopedia-high school mathematics