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题目(2016年黄冈市高三适应性考试理15)已知O是锐角△ABC的外接圆的圆心,tanA=1/2,cosB/sinCAB+cosC/sinBAC=2mAO,则m=______.笔者所在学校在周考中使用了该卷,结果全班70位学生中只有19人做对,正确率不到30%,这今笔者非常吃惊,因为以向量等式mOP=λOA+μOB为背景的问题是向量中常见的题型,经过分析,笔者认为,这道向量题的难点在于它涉及的
The subject (2016 Huanggang high school three adaptive test theory 15) is known O is the center of the circumcircle of the acute angle △ ABC, tanA = 1/2, cosB / sinCAB + cosC / sinBAC = 2mAO, then m = ______. The volume was used during the week test, and as a result, only 19 out of 70 students in the class were right, with a correct rate of less than 30%. This author was very surprised at this point because the problem with the vector equation mOP = λOA + μOB is The common question type in the vector, after analyzing, I think, the difficulty of this vector question lies in it involves