High school physics self-study needs a certain mathematical foundation. First, you need to master the basic knowledge of algebra and geometry. This includes the operation of integers, fractions and decimals, and the solution of linear equations with one variable and linear equations with two variables. In addition, you need to understand the basic concepts of plane geometry and solid geometry, such as points, lines, surfaces, angles, triangles, quadrilaterals and so on.

Secondly, you need to master the knowledge of trigonometric functions. Including the definition and properties of trigonometric functions such as sine, cosine and tangent, as well as their images and periodicity. In addition, you need to know the basic formulas of trigonometric functions, such as sum-difference product, product and difference.

Third, you need to master the knowledge of elementary functions. This includes the definitions and properties of basic elementary functions such as exponential function, logarithmic function and power function, as well as their images and periodicity. In addition, you need to know the basic formulas of elementary functions, such as the formula of changing bases, logarithmic identities and so on.

Finally, you need to master the basic knowledge of probability and statistics. This includes the definition and properties of probability, and the calculation method of probability. In addition, you need to understand the basic concepts of statistics, such as average, median, mode and so on.

In short, self-study of high school physics requires a certain mathematical foundation. If your math foundation is weak, I suggest you take some math courses first to improve your math level. This will make physics in high school easier.