1. Basic formula of trigonometric function: sin? x + cos？ x = 1； tan x = sin x/cos x； cot x = cos x/sin x； sec x = 1/cos x； csc x = 1 / sin x .
2. Pythagorean theorem: the square of the hypotenuse of a right triangle is equal to the sum of the squares of two waists. Answer? + b？ = c？ .
3. Plane geometry formula: analytical formula of straight line in plane, formula of distance between two points, formula of plane vector, formula of included angle between two straight lines in plane, analytical formula of circle (standard formula and general formula) and general formula of circle.
4. Series and series formulas: general formula, sum formula of the first n terms, general formula of arithmetic progression, general formula of geometric progression and sum formula of the first n terms of geometric progression.
5. Derivative formula: Derivative rules (such as constant rule, addition rule, multiplication rule, derivative of compound function, derivative of power function, derivative of exponential function, etc.). ).
6. Matrix formula: the basic concept of matrix and its operations (such as addition, subtraction, number multiplication, point multiplication, etc.). ), matrix transposition, determinant of matrix, inverse matrix of matrix, etc.
The above are several basic formulas commonly used in college entrance examination mathematics, which need to be mastered and skillfully used by the majority of candidates in the preparation process. In addition to the basic formulas, we should also pay attention to the correlation and application of various formulas, as well as the specific application scope and conditions of formulas. Only by mastering this knowledge can we better cope with the exam.