论文部分内容阅读
1问题提出问题如图,直角坐标系x’Oy所在的平面为β,直角坐标系xOy所在的平面为α,且二面角α-y轴-β的大小等于30°.已知β内的曲线C’的方程是3(x’-23~(1/2))~2+4y~2-36=0,则曲线C’在α内的射影的曲线方程是___.(答案:(x-3)~2+y~2=9)这是一道期末统考试题,安排在填空题的最后一题(占4分).在知识方面,主要考查学生对二面角及曲线方程概念的理解;在能力方面,主要考查学生的几何直观能力,在陌生试题情境中提取信息分析问题、解决问题的能力.原以为学生平均
1 problem raised the problem map, Cartesian coordinate system x’Oy where the plane is β, Cartesian coordinate system xOy where the plane is α, and the dihedral angle α-y axis-β size is equal to 30. It is known β The equation of curve C ’is 3 (x’-23 ~ (1/2)) ~ 2 + 4y ~ 2-36 = 0, then the curve equation of curve C’ in α is ___. (Answer: ( x-3) ~ 2 + y ~ 2 = 9) This is a final examination questions, arranged in the last question of fill in the blank (4 points) .In knowledge, the main test students on the dihedral angle and the concept of the equation Understanding; in terms of ability, the main test of students’ geometric intuition ability to extract information in unfamiliar test situations to analyze problems, the ability to solve problems.It is thought that the average student