1, the formula of trigonometric function: sin? θ + cos？ θ = 1 tanθ = sinθ/cosθ.
2. Conversion between angle system and arc system: angle system = arc system × 180/π arc system = angle system × π/ 180.
3. Relationship between circle and circumference: area of circle: S=πr? Circumference: C=2πr Arc length formula: L = θ/2π × 2πr = θr (where θ is the radian value of the central angle).
4. Triangle area formula: area formula: S = 1/2 × bottom× Gao Hailong formula: S= √[p(p-a)(p-b)(p-c)], where p=(a+b+c)/2.
5. Plane geometry formula: distance formula between two points: d = √[(x2-x 1)? +(y2-y 1)？ ] Midpoint formula: (x, Y)=((x 1+x2)/2, (y 1+y2)/2) Midline formula: Ax+By+C = 0 (where a, b and c are defined by the midpoint (x, y) and a given point (.
6. arithmetic progression sum proportional series formula: arithmetic progression general formula: an = a 1+(n- 1)d arithmetic progression first n sum formula: Sn = n/2(a 1+an) geometric progression general formula: an = a1× q.
Precautions:
1, Skillful use of basic concepts and formulas: Mathematics test questions in college entrance examination usually involve many formulas and basic concepts, which need candidates to master skillfully and apply them quickly and accurately.
2. Familiar with the reading and inference ability of charts: There are many charts and data involved in the math college entrance examination, and candidates need to have the ability to read, understand and infer data quickly and familiarly.
3. Keep your mind stable and avoid nervousness and panic: The math college entrance examination questions are complicated, so candidates need to keep their mind stable in the examination room to avoid the influence of nervousness and panic on the answer results.
4. Be good at applying mathematical thinking: Mathematics college entrance examination questions often involve some abstract problems, which require candidates to have good mathematical thinking and innovative spirit and be good at solving problems from multiple angles.
5. Refined ideas and methods of answering questions: Candidates need to refine their ideas and methods in the process of answering the math college entrance examination questions, choose whatever they think, correct them if they are wrong, and answer questions impartially.