Formulas that must be memorized in senior high school mathematics: images and properties of basic elementary functions (exponential function, logarithmic function, power function, trigonometric function and inverse trigonometric function). The identification and judgment of point-to-line, line-to-line and face-to-face in solid geometry, three vertical theorems. The basic formulas of straight line (parallel and vertical judgment), circle, parabola and hyperbola equations in analytic geometry. Trigonometric identity transformation formulas (many). Cosine theorem. In the series, the general formula of arithmetic progression and geometric progression and the calculation formula of the sum of the nth term. Basic inequality √ab≤(a+b)/2. Probability calculation. Binomial theorem. Derivative and differential judgment calculation. Imaginary number calculation.