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在高中数学课本“三角函数”一章里,曾有这样一道题目:问题1 如图1,求半圆O的内接矩形面积的最大值(圆的半径为1).解析:连结OA.从三角函数的角度思考.设∠AOB=θ
In the high school mathematics textbook “Trigonometric function” chapter, there has been such a problem: Problem 1 As in Figure 1, find the semicircle O inscribed rectangular area of the maximum (circle radius of 1). Analysis: link OA. Think from the perspective of trigonometric functions. Let ∠ AOB = θ