Question 1: Simplify the evaluation class by using the same trigonometric function relation, inductive formula, sum, difference, multiple and half formulas.

Question 2: Using the properties of trigonometric functions to solve problems, we usually investigate the monotonicity, periodicity, maximum value, symmetry axis and symmetry center of sine and cosine functions.

Question 3: Solve the trigonometric function problem, judge the triangle shape and apply the sine and cosine theorem.

Question 4: The solution of the general term formula of sequence.

Question 5: the solution of the sum of the first n items in the sequence.

Question 6: Using derivative to study the extreme value and maximum value of function.

Question 7: Using the geometric meaning of derivative to find the tangent equation.

Question 8: Study the monotonicity, extreme value and maximum value of functions by using derivatives.

Question 9: Study the image of function with derivative.

Problem 10: Find the range, constancy and existence of parameters.

Question 1 1: The combination of numbers and shapes determines the positional relationship between straight lines and conic curves.

Problem 12: focus trigonometric function, focus radius, focus chord problem.

Problem 13: the problem of moving point trajectory equation.

Problem14: * * * Line problem.

Problem 15: Fixed-point problem.

Question 16: Existentialism.

There are straight lines y=kx+m, real numbers and figures: triangles (equal proportions, isosceles, right angles), quadrangles (rectangles, diamonds, squares) and circles.

Question 17: The most valuable question.